But will this activate my tier 5 work visa if they stamp it? When I asked border patrol on the way through they didn’t seem to have an answer

I arrived a day early of my expected date and was told to leave the country and return!

I bought a round trip to France on a bus but I’m concerned that they don’t have the proper people to stamp it and activate it.

I can’t find any information on it and urgently need an answer.