• N1 (London) Northern head district: Barnsbury, Canonbury, Kings Cross, Islington, Pentonville, De Beauvoir Town, Hoxton

• N2 (London) East Finchley district: East Finchley, Fortis Green, Hampstead Garden Suburb

• N3 (London) Finchley district: Finchley, Church End, Finchley Central

• N4 (London) Finsbury Park district: Finsbury Park, Manor House, Harringay, Stroud Green

• N5 (London) Highbury district: Highbury, Highbury Fields

• N6 (London) Highgate district: Highgate, Hampstead Heath

• N7 (London) Holloway district: Holloway, Barnsbury, Islington, Tufnell Park

• N8 (London) Hornsey district: Hornsey, Crouch End, Harringay

• N9 (London) Lower Edmonton district: Lower Edmonton, Edmonton

• N10 (London) Muswell Hill district: Muswell Hill

• N11 (London) New Southgate district: New Southgate, Friern Barnet, Bounds Green, Arnos Grove

• N12 (London) North Finchley district: North Finchley, Woodside Park

• N13 (London) Palmers Green district: Palmers Green

• N14 (London) Southgate district: Southgate, Oakwood, Arnos Grove

• N15 (London) South Tottenham district: South Tottenham, Harringay, West Green, Seven Sisters, Stamford Hill

• N16 (London) Stoke Newington district: Stoke Newington, Stamford Hill, Shacklewell, Dalston, Newington Green

• N17 (London) Tottenham district: Tottenham, South Tottenham

• N18 (London) Upper Edmonton district: Upper Edmonton, Edmonton

• N19 (London) Upper Holloway district: Upper Holloway, Archway, Tufnell Park, Hornsey

• N20 (London) Whetstone district: Whetstone, Totteridge, Oakleigh Park

• N21 (London) Winchmore Hill district: Winchmore Hill, Bush Hill, Grange Park

• N22 (London) Wood Green district: Wood Green, Bounds Green, Bowes Park

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• NW1 (London) North Western head district: Marylebone, Euston, Regent's Park, Camden Town, Somers Town, Primrose Hill, Gospel Oak and Lisson Grove

• NW2 (London) Cricklewood district: Cricklewood, Willesden, Neasden, Dollis Hill, Childs Hill

• NW3 (London) Hampstead district: Hampstead, Chalk Farm, Primrose Hill, Swiss Cottage, Belsize Park, Gospel Oak, Frognal, Childs Hill

• NW4 (London) Hendon district: Hendon, Brent Cross

• NW5 (London) Kentish Town district: Kentish Town, Tufnell Park, Dartmouth Park, Gospel Oak

• NW6 (London) Kilburn district: Kilburn, Brondesbury, West Hampstead, Queen's Park

• NW7 (London) Mill Hill district: Mill Hill, Arkley

• NW8 (London) St John's Wood district: St John's Wood, Primrose Hill, Lisson Grove

• NW9 (London) The Hyde district: The Hyde, Colindale, Kingsbury, Queensbury, West Hendon

• NW10 (London) Willesden district: Willesden, Harlesden, Kensal Green, Stonebridge, Brent Park, Church End, Neasden, Kilburn, Acton, Park Royal,

• NW11 (London) Golders Green district: Golders Green, Hampstead Garden Suburb

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• WC1A (London) New Oxford Street

• WC1B (London) Bloomsbury, British Museum

• WC1E (London) University College London

• WC1H (London) St Pancras

• WC1N (London) Russell Square

• WC1R (London) Gray's Inn

• WC1V (London) High Holborn

• WC1X (London) Kings Cross, Finsbury (west)

• WC2A (London) Lincoln's Inn Fields, Royal Courts of Justice

• WC2B (London) Drury Lane, Aldwych

• WC2E (London) Covent Garden

• WC2H (London) Leicester Square

• WC2N (London) Charing Cross

• WC2R (London) Somerset House

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• W2 (London) Paddington head district: Paddington, Bayswater, Hyde Park, Westbourne Green, Little Venice, Notting Hill

• W3 (London) Acton district: Acton, East Acton, Park Royal, West Acton

• W4 (London) Chiswick district: Chiswick, Gunnersbury, Turnham Green, Bedford Park

• W5 (London) Ealing district: Ealing, Park Royal

• W6 (London) Hammersmith district: Hammersmith, Ravenscourt Park

• W7 (London) Hanwell district: Hanwell, Boston Manor

• W8 (London) Kensington district: Kensington, Holland Park

• W9 (London) Maida Hill district: Maida Hill, Maida Vale, Little Venice

• W10 (London) North Kensington district: North Kensington, Queens Park

• W11 (London) Notting Hill district: Notting Hill, Holland Park

• W12 (London) Shepherds Bush district: Shepherds Bush, White City

• W13 (London) West Ealing district: West Ealing, Northfields

• W14 (London) West Kensington district: West Kensington, Kensington Olympia, Holland Park

• W1B (London) Portland Street, Regent Street

• W1C (London) Oxford Street (west)

• W1D (London) Soho (south east); Chinatown, Soho Square

• W1F (London) Soho (north west)

• W1G (London) Harley Street

• W1H (London) Marylebone

• W1J (London) Mayfair (south), Piccadilly, Royal Academy

• W1K (London) Mayfair (north), Grosvenor Square

• W1S (London) Hanover Square, Savile Row

• W1T (London) Fitzrovia, Tottenham Court Road

• W1U (London) Marylebone

• W1W (London) Great Portland Street, Fitzrovia

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• W2 (London) Paddington head district: Paddington, Bayswater, Hyde Park, Westbourne Green, Little Venice, Notting Hill

• W3 (London) Acton district: Acton, East Acton, Park Royal, West Acton

• W4 (London) Chiswick district: Chiswick, Gunnersbury, Turnham Green, Bedford Park

• W5 (London) Ealing district: Ealing, Park Royal

• W6 (London) Hammersmith district: Hammersmith, Ravenscourt Park

• W7 (London) Hanwell district: Hanwell, Boston Manor

• W8 (London) Kensington district: Kensington, Holland Park

• W9 (London) Maida Hill district: Maida Hill, Maida Vale, Little Venice

• W10 (London) North Kensington district: North Kensington, Queens Park

• W11 (London) Notting Hill district: Notting Hill, Holland Park

• W12 (London) Shepherds Bush district: Shepherds Bush, White City

• W13 (London) West Ealing district: West Ealing, Northfields

• W14 (London) West Kensington district: West Kensington, Kensington Olympia, Holland Park

• W1B (London) Portland Street, Regent Street

• W1C (London) Oxford Street (west)

• W1D (London) Soho (south east); Chinatown, Soho Square

• W1F (London) Soho (north west)

• W1G (London) Harley Street

• W1H (London) Marylebone

• W1J (London) Mayfair (south), Piccadilly, Royal Academy

• W1K (London) Mayfair (north), Grosvenor Square

• W1S (London) Hanover Square, Savile Row

• W1T (London) Fitzrovia, Tottenham Court Road

• W1U (London) Marylebone

• W1W (London) Great Portland Street, Fitzrovia

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• EN1 (Enfield) Bush Hill Park; eastern parts of Bulls Cross, Enfield Town, Forty Hill, outskirts of Lower Edmonton

• EN2 (Enfield) Botany Bay, Clay Hill, Crews Hill; western parts of Bulls Cross, Enfield Chase, Enfield Town, Forty Hill

• EN3 (Enfield) Enfield Highway, Enfield Island Village, Enfield Lock, Enfield Wash, Ponders End

• EN4 (Barnet) Hadley Wood, Cockfosters, East Barnet, New Barnet

• EN5 (Barnet) High Barnet, Arkley

• EN6 (Potters Bar) Potters Bar, South Mimms, Cuffley, Northaw

• EN7 (Waltham Cross) Cheshunt

• EN8 (Waltham Cross) Waltham Cross, Cheshunt

• EN9 (Waltham Abbey) Waltham Abbey

• EN10 (Broxbourne) Broxbourne

• EN11 (Hoddesdon) Hoddesdon

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• AL1 (St. Albans) St Albans

• AL2 (St. Albans) St Albans, Bricket Wood, Colney Street, Frogmore, London Colney, Napsbury, Park Street, Potters Crouch, Chiswell Green

• AL3 (St. Albans) St Albans, Childwickbury, Flamstead, Gorhambury, Markyate, Porters Wood, Redbourn, Sandridge

• AL4 (St. Albans) St Albans, Colney Heath, London Colney, Jersey Farm, Marshalswick, Oaklands, Sandridge, Smallford, Tyttenhanger, Wheathampstead

• AL5 (Harpenden) Harpenden

• AL6 (Welwyn) Welwyn, Ayot St Peter, Ayot St Lawrence, Digswell, Rabley Heath, Tewin

• AL7 (Welwyn Garden City) Welwyn Garden City

• AL8 (Welwyn Garden City) Welwyn Garden City, Lemsford

• AL9 (Hatfield) Hatfield, Brookmans Park, Essendon, North Mymms

• AL10 (Hatfield) Hatfield

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• WD3 (Rickmansworth) Batchworth Heath, Chandlers Cross, Chenies, Chorleywood, Croxley Green, Heronsgate, Loudwater, Maple Cross, Mill End, Rickmansworth, Sarratt, West Hyde

• WD4 (Kings Langley) Bucks Hill, Chipperfield, Hunton Bridge, Kings Langley

• WD5 (Abbots Langley) Bedmond, Abbots Langley

• WD6 (Borehamwood) Borehamwood, Elstree, Well End

• WD7 (Radlett) Shenley, Radlett

• WD17 (Watford) Watford, Cassiobury, Nascot Wood

• WD18 (Watford) West Watford

• WD19 (Watford) Oxhey, South Oxhey, Carpenders Park

• WD23 (Bushey) Bushey, Bushey Heath

• WD24 (Watford) North Watford

• WD25 (Watford) Garston, Aldenham, Leavesden, Letchmore Heath