Hi! I would also get cold feets if aMember did not accept euro symbol, which I still have to try it out.
Amember allows you to set the currency in the Admin console under Setup Configuration. If you go to the Global Tab you should see Display Currency towards the bottom. This is the cosmetic display change. For PayPal change you need to modify your product and set the individual Product "PayPal Currency" to whatever you need it to be. Right now it has possible values of: USD GBP EUR CAD AUD JPY so your GBP should work just fine for you. Hope this helps. Frank