When traveling in the UK, you can use your mother’s credit card, but you need to pay attention to the rules for using the credit card and you cannot lend the credit card to others.

As for tax rebates, you can get tax rebates when you use a credit card to make purchases, but you need to pay attention to the following points:

1. You must present your passport as proof of identity when shopping.

2. Payment must be made by credit card before leaving the UK.

3. The tax refund amount may gradually arrive in your account within a certain period of time. The specific time depends on the tax refund method and merchant policies.

In short, if you comply with the credit card usage regulations and meet the tax refund conditions, you can get a tax refund when traveling in the UK using your mother’s credit card.