Ask an Immigration Solicitor. Get an Answer ASAP.
When do you plan to return from Gambia?
I think that is an automatic suggestion for a phone call, please ignore it.
I do confirm that are legally able to travel to Gambia and return freely, without the need to renew your passport.
Correct, you will be completely fine and legally allowed to travel.
No worries, I understand completely.
Have a lovely evening!