Depositing from the UK to buy ETH?

Hi all,

I have done quite a bit of research on what is the best way to buy ETH from the UK and Binance/Kraken seem the way to go but I am still a bit confused on what the best method is to minimise fees? I am looking to buy around 20k worth of ETH and I can see that depositing with a bank card has a 1.8% fee while Advcash has 0% so I am wondering if that's a possibility for someone in the UK?

Any advice would be greatly appreciated :)