the only way I know of to bring in "extra" cigs when you are coming home is to
1) take a trip to Rhodes from
Marmaris on the ferry
2) buy your [EU] fags/bacci/booze and pay the EU duty
3) keep your receipts
4)bring them home- if/when challenged in the UK on arrival, produce your Greek receipt and bingo!
not sure of the allowances from Rhodes to Turkey, but basically because you've paid your EU duty in Greece, you can bring more than 200 to the UK - subject of course to the restrictions of bringing them into Turkey in the 1st place
and on top of that, you'll also have your 200 duty free limit which you can buy in Turkey to bring into the UK
though am a smoker myself, cant see it's worth the hassle - I'd rather just bring back 200 from Turkey having had a ball in the best place on earth hehehe