The photos were of phone boxes in postcodes where Ken won or his team won in the Nike Grid challenge (if you look in the top left of the phone box adverts you'll see the name of the person who won the postcode).
Ken adds: As an aside, and because I suspect it'll be of interest to you, the game got people talking quite a lot about phone boxes. Unsurprisingly almost none of us had use them in years, and there was quite a lot of discussion about how they were used. You could tell the sort of area you were in by the condition of the phone box and how much they were used. One of my favourite quotes from just after the end of the game was "And with that done we return the phoneboxes of london to their usual clientel, the tramps and the hookers, the junkies and those caught out for somewhere to go to the loo, people just standing in them to avoid the weather, and god forbid the odd person on a phone call, till next time gridette!!!!" (where Gridette was the name we gave to the automated voice on the phone call).
Thanks again Ken and well done to your team.
Below you'll find a great index of the actual payphones with their telephone numbers and locations around London, UK.
+442072474538 E1 PARFETT ST / COMMERCIAL RD
+442077027099 E1 BEN JOHNSON RD
+442077027044 E1 CAMBRIDGE HEATH RD
+442074807888 E1 DOCK ST
+442079874157 E14 ABBOTT RD
+442075156346 E14 MANCHESTER RD
+442079874990 E14 WEST FERRY RD
+442079871690 E14 BURDETT RD
+442085557596 E15 LEYTON RD
+442085360671 E15 HIGH ST/ CARPENTERS RD
+442085192175 E15 PLAISTOW RD
+442085199413 E15 VICARAGE LANE
+442089806402 E2 ROMAN RD
+442077399564 E2 BETHNAL GREEN RD
+442077391822 E2 HACKNEY RD
+442076131971 E2 PRITCHARDS ROW
+442089804184 E3 BROMLEY HIGH ST
+442075384280 E3 ST PAULS WAY
+442089830655 E3 GROVE ROAD
+442089834318 E3 OLD FORD RD
+442085330007 E5 POWERSCROFT RD
+442088066133 E5 SOUTHWOLD RD
+442088066172 E5 UPPER CLAPTON RD/ ICKBURGH RD
+442088062306 E5 UPPER CLAPTON RD/ FORBURG RD
+442089862534 E8 AMHURST RD
+442072411338 E8 SHACKLEWELL LANE
+442089852576 E8 MARE ST
+442072546191 E8 KINGSLAND RD
+442085336169 E9 WICK RD
+442089860574 E9 HOMERTON RD
+442085250036 E9 HOMERTON HIGH ST
+442085337951 E9 WELL ST
+442076064924 EC1 GILTSPUR ST
+442074902750 EC1 CITY RD
+442074904135 EC1 GOSWELL RD
+442074903042 EC1 OLD ST
+442073748181 EC2 LONDON WALL
+442073746999 EC2 MOORGATE
+442076289923 EC2 FORE ST
+442076000478 EC2 ALDERMANBURY ST
+442076263747 EC3 HOUNDSDITCH
+442072207989 EC3 FENCHURCH ST
+442072207992 EC3 EASTCHEAP
+442076264049 EC3 KING WILLIAM ST
+442074898414 EC4 CANNON ST
+442077262924 EC4 NEWGATE ST
+442072364244 EC4 QUEEN VICTORIA ST/ QUEEN ST
+442073538537 EC4 NEW BRIDGE ST
+442077005783 N1 CALEDONIAN RD
+442077042064 N1 ESSEX RD
+442074904293 N1 EAST RD
+442077137463 N1 PENTONVILLE RD
+442088000010 N16 LORDSHIP PARK
+442084424960 N16 OLDHILL ST
+442088005102 N16 EGERTON RD
+442072499752 N16 MATTHIAS RD
+442072818388 N19 HOLLOWAY RD
+442072817193 N19 HORNSEY RD / LAMBTON RD
+442072813635 N19 ST JOHNS WAY
+442076095072 N19 BRECKNOCK RD
+442088092469 N4 GREEN LANES
+442072260288 N4 BLACKSTOCK RD
+442088023830 N4 WOODBERRY GROVE
+442072722921 N4 HANLEY RD
+442072261547 N5 DRAYTON PARK/ GILLESPIE RD
+442076073146 N5 DRAYTON PARK/ HORSELL RD
+442073590390 N5 GROSVENOR AVE
+442073598839 N5 HIGHBURY PARK
+442083406637 N6 ARCHWAY RD/ SOUTHWOOD AVE
+442083402632 N6 ARCHWAY RD
+442083484741 N6 ARCHWAY RD/ SHEPHERDS HILL
+442083485318 N6 HURST AVE
+442072818138 N7 HOLLOWAY RD/ TUFNELL PARK RD
+442072817521 N7 SEVEN SISTERS RD
+442077004915 N7 HOLLOWAY RD/ EDEN GROVE
+442077001596 N7 NORTH RD JUNCTION
+442073835568 NW1 MORNINGTON CRESCENT STATION
+442077062791 NW1 LISSON GROVE/ HAREWOOD RD
+442074856029 NW1 CHALK FARM RD
+442072840601 NW1 CAMDEN RD/ ST PANCRAS WAY
+442074351639 NW3 SOUTHEND RD/ ST CRISPINS CLOSE
+442077220397 NW3 ADELAIDE RD
+442076246962 NW3 CANFIELD GARDENS
+442077228679 NW3 FINCHLEY RD/ FAIRFAX RD
+442072842083 NW5 HIGHGATE RD
+442072723454 NW5 CROFTDOWN RD
+442072842643 NW5 KENTISH TOWN RD
+442074858480 NW5 QUEENS CRESCENT
+442084505367 NW6 MILL LANE
+442076248451 NW6 ABBEY RD/ WEST END LANE
+442076257223 NW6 KILBURN HIGH RD
+442076257280 NW6 SALUSBURY RD
+442077221276 NW8 TOWNSHEND RD
+442077220143 NW8 COCHRANE ST
+442072662472 NW8 LISSON GROVE
+442073286093 NW8 ABERCORN PLACE
+442074073599 SE1 BOROUGH HIGH ST
+442072374299 SE1 OLD KENT RD/ AVONDALE SQ
+442074019387 SE1 LONDON RD
+442079282418 SE1 LAMBETH PALACE RD
+442075826570 SE11 VAUXHALL ST
+442077350460 SE11 KENNINGTON PARK RD
+442077353761 SE11 KENNINGTON RD/ KENNINGTON LANE
+442077352495 SE11 KENNINGTON RD/ LAMBETH RD
+442076394919 SE14 ERLANGER RD
+442086921162 SE14 NYNEHEAD ST
+442086921428 SE14 LEWISHAM WAY
+442086942023 SE14 NEW CROSS RD
+442076395257 SE15 GIBBON RD
+442076399939 SE15 ASYLUM RD
+442072779240 SE15 PECKHAM RYE
+442077083930 SE15 ST GEORGES WAY
+442073940189 SE16 ROTHERHITHE NEW RD
+442072372479 SE16 SOUTHWARK PARK RD
+442072374519 SE16 BRUNEL ST
+442072372599 SE16 ROTHERHITHE ST
+442072770687 SE17 WANSEY ST
+442072770610 SE17 EAST ST
+442072770572 SE17 BAGSHOT ST
+442077350536 SE17 LORRIMORE RD
+442075828943 SE5 CAMBERWELL NEW RD
+442077013970 SE5 SOUTHHAMPTON WAY/ COLEMAN RD
+442072770513 SE5 SOUTHAMPTON WAY/ NEW CHURCH RD
+442079240187 SE5 DENMARK HILL
+442072331676 SW1 GREAT PETER ST
+442072339573 SW1 LUPUS ST
+442077302834 SW1 SEDDING ST
+442072459612 SW1 KNIGHTSBRIDGE GREEN
+442077302011 SW3 KINGS RD
+442073525253 SW3 BEAUFORT ST
+442073514342 SW3 KINGS RD/ MANRESA RD
+442075891466 SW3 SLOANE AVE
+442075848163 SW7 CROMWELL RD
+442072447979 SW7 FULHAM RD
+442078239834 SW7 QUEENS GATE TERRACE / PETERSHAM LANE
+442073739048 SW7 CROMWELL RD/ GRENVILLE PLACE
+442077357037 SW8 DORSET RD
+442074981375 SW8 WANDSWORTH RD
+442074983962 SW8 BATTERSEA PARK RD
+442076223597 SW8 WANDSWORTH RD/ WILCOX RD
+442077938910 SW9 BRIXTON RD
+442077374345 SW9 BARRINGTON RD
+442077385374 SW9 COLDHARBOUR LANE
+442077375414 SW9 STOCKWELL RD
+442072552147 W1 TOTTENHAM COURT RD
+442073837138 W1 TOTTENHAM COURT RD/ GRAFTON WAY
+442074090598 W1 LUMLEY ST
+442072245074 W1 CRAWFORD ST
+442089692416 W10 DART ST
+442089644266 W10 HARROW RD/ FORTH AVE
+442089648174 W10 SHREWSBURY ST
+442089648535 W10 BEVINGTON RD
+442077921131 W11 CLYDESDALE RD
+442072297393 W11 WESTBOURNE GROVE
+442077923183 W11 HOLLAND PARK AVE
+442072290658 W11 WALMER RD
+442087401293 W12 HEMLOCK RD
+442087493832 W12 DU CANE RD
+442087405920 W12 GOLDHAWK RD
+442087434368 W12 ASKEW RD/ GOLDHAWKE RD
+442076030034 W14 RUSSELL GARDENS
+442076033016 W14 WARWICK RD
+442073713276 W14 NORTH END RD / EDITH RD
+442073860910 W14 NORTH END RD/ BEAUMONT CRESCENT
+442074022801 W2 PRAED ST
+442077062370 W2 BAYSWATER RD/ BROOK ST
+442077243382 W2 BAYSWATER RD/ PORCHESTER TERRACE
+442077920178 W2 WESTBOURNE GROVE / HEREFORD RD
+442089937695 W3 HORN LANE
+442088962773 W3 GUNNERSBURY LANE
+442089921855 W3 GUNNERSBURY AVE
+442087521672 W3 HIGH ST
+442073714260 W6 SHEPHERDS BUSH RD
+442087484106 W6 COLET GARDENS
+442087486372 W6 KING ST
+442087487921 W6 HAMMERSMITH FLYOVER/ SUSSEX PLACE
+442077921098 W8 KENSINGTON CHURCH ST
+442075895278 W8 HYDE PARK GATE
+442079378933 W8 MARLOES RD
+442076025609 W8 KENSINGTON HIGH ST
+442072661521 W9 SHIRLAND RD
+442089692304 W9 FERNHEAD RD
+442089692714 W9 HARROW RD / PORTNALL RD
+442072662907 W9 HARROW RD/ ELMFIELD WAY
+442072407392 WC1 NEW OXFORD ST
+442078371928 WC1 BRUNSWICK SQ
+442078313906 WC1 HIGH HOLBORN
+442078315170 WC1 GRAYS INN RD
+442074376089 WC2 LEICESTER SQUARE
+442072871223 WC2 CHARING CROSS RD
+442078315917 WC2 KINGSWAY
+442074970164 WC2 TEMPLE PLACE