I would suggest playing 10c/20c blinds since you would end up having a stack of about 100 big blinds which in my personal experience is the absolute minimum for a good cash game.
The fact that in England you have 20p coins instead of the American 25c coins helps too!
For 6 players:
6x20= 120x 10p
6x16= 96x 50p
6x10= 60x 1£
6x1= 6x 5£
Total 25£
Round up to 180+160+120+40 chips for a safe option which allows for 8 players and rebuys.