I live in London and I found the following websites of you wanna buy silver with NO VAT and reliable 100% in Europe:

www.europesilverbullion.com
www.celticgold.eu/en

I bought thousands of silver coins in last 6 months. Both of them delivery all over Europe and paypal payment is available for one of them.

Then, if you would like to buy other PMs (gold, silver, platinum, palladium), even just grams, please check this one:

https://www.goldmoney.com/w/dcgold

I could not keep all of my physical at home and this is a cool alternative. Here the PMs' premium price are way lower then the normal website and you have physical stored in many safe places which you can claim back as soon as you need directly into your bank account.

Hope it can help you and Be your own bank ;)