| CH1 |
CHESTER |
Blacon, Chester, Higher Ferry, Capenhurst, Backford |
Cheshire West and Chester, Flintshire |
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| CH2 |
CHESTER |
Backford, Chester, Elton, Hoole, Ince, Mickle Trafford, Moston, Newton by Chester, Upton-by-Chester |
Cheshire West and Chester |
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| CH3 |
CHESTER |
Boughton, Chester, Huntington, Mouldsworth, Tarvin, Tattenhall, Farndon, Waverton, Saighton, Upton-by-Chester |
Cheshire West and Chester |
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| CH4 |
CHESTER |
Chester, Curzon Park, Handbridge, Lache, Pulford, Penyffordd, Broughton, Saltney |
Cheshire West and Chester, Flintshire |
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| CH5 |
DEESIDE |
Connah's Quay, Shotton, Queensferry, Sealand, Garden City, Sandycroft, Hawarden, Ewloe, Mancot |
Flintshire |
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| CH6 |
BAGILLT |
Bagillt |
Flintshire |
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| FLINT |
Flint, Oakenholt, Flint Mountain |
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| CH7 |
BUCKLEY |
Buckley |
Flintshire, Denbighshire |
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| MOLD |
Mold, Leeswood, Treuddyn, Llanarmon-yn-Ial, Caerwys, Northop Hall |
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| CH8 |
HOLYWELL |
Holywell, Milwr, Holway, Carmel, Lloc, Bryn Celyn, Greenfield, Halkyn, Lixwm, Talacre |
Flintshire |
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| CH25 |
BIRKENHEAD |
PO Boxes |
non-geographic |
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| CH26 |
PRENTON |
PO Boxes |
non-geographic |
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| CH27 |
WALLASEY |
PO Boxes |
non-geographic |
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| CH28 |
WIRRAL |
PO Boxes in Moreton |
non-geographic |
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| CH29 |
WIRRAL |
PO Boxes in Hoylake |
non-geographic |
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| CH30 |
WIRRAL |
PO Boxes in Upton |
non-geographic |
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| CH31 |
WIRRAL |
PO Boxes in Heswall |
non-geographic |
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| CH32 |
WIRRAL |
PO Boxes in New Ferry |
non-geographic |
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| CH33 |
NESTON |
PO Boxes |
non-geographic |
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| CH34 |
ELLESMERE PORT |
PO Boxes |
non-geographic |
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| CH41 |
BIRKENHEAD |
Birkenhead, Claughton, Seacombe, Tranmere, Woodside |
Wirral |
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| CH42 |
BIRKENHEAD |
Birkenhead, Oxton, Prenton, Rock Ferry |
Wirral |
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| CH43 |
PRENTON |
Beechwood, Bidston, Noctorum, Oxton, Prenton |
Wirral |
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| CH44 |
WALLASEY |
Egremont, Liscard, Poulton, Seacombe, Wallasey |
Wirral |
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| CH45 |
WALLASEY |
New Brighton, Wallasey, Wallasey Village |
Wirral |
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| CH46 |
WIRRAL |
Leasowe, Moreton, Saughall Massie |
Wirral |
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| CH47 |
WIRRAL |
Hoylake, Meols |
Wirral |
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| CH48 |
WIRRAL |
Caldy, Frankby, Grange, Hoylake, Newton, West Kirby |
Wirral |
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| CH64 |
NESTON |
Parkgate, Neston, Willaston, Little Neston, Ness, Puddington, Burton |
Cheshire West and Chester |
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| CH65 |
ELLESMERE PORT |
Ellesmere Port, Great Sutton, Whitby, Wolverham |
Cheshire West and Chester |
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| CH66 |
ELLESMERE PORT |
Childer Thornton, Ellesmere Port, Great Sutton, Hooton, Ledsham, Little Sutton, Overpool, Whitby |
Cheshire West and Chester |
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| CH88 |
CHESTER |
North West Securities Bank[4] |
non-geographic |
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| CH99 |
CHESTER |
Benefits Agency,[4] St. Michaels Financial Services & Chargecard[4] |
non-geographic |
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