1. Would you store it in a savings wallet to earn interest.
2. Would you leave it and watch it hopefully rise.
3. Would you sell it.
4. Would you trade it for another Cryptocurrency.
5. Would you buy more Bitcoin.
6. Would you do something else with it.
I don't really get the £10 Bitcoin part. Is that a 10 USD worth of BTC? If that's it then I can do anything much for such 10 USD worth of BTC especially nowadays. So I'll probably just keep it and forget about it but I'll consider all the options you've mentioned when the time comes when I needed it