Best £1 Deposit Casinos
Most casinos have a minimum withdrawal limit of £1 so most probably you wont be able to withdrawal such a small amount of money.
Most casinos offer a deposit with card or bank transfer
The payout percentage won't change because you make a lower deposit. The problem will be that you might run of money very quickly.
You will have a very low risk playing with just £1. We always suggest to try a casino for the first time with the minimum deposit.