How do I check the amount of coins are in a crypto wallet?
Bitcoin is not really stored in wallets. The only important data in a Bitcoin wallet is a large random-looking number called a private key that is kept secret and which is used to provide mathematical proof of the right to spend some amount of money.
Amounts are kept track of in a public journal of ...
I don't have any Bitcoin account [...] but I got an email that I have received £46,21745 in my account
It is a lie. There's no money. It is a trick by criminals who will
later ask you to pay some fake fees that they invent.
After you realise you have been tricked, some other person (criminals also, maybe the same ones) will then contact you to offer fake ...