If you get the offer snap it up. One of the biggest mistakes I ever made was leaving Tesco and the boss there told me at the time “I don’t care how bored you feel, think of what you are giving up”
He was right, the shares given to employee’s alone are amazing, I know the pay now is less than it was back then but if I was living back in the UK I would not hesitate to take it … Good luck to you.