Looking for good restaurant recs in the southeast / Cheltenham area

Hey all, it's my dad's 80th coming up and were looking for a nice restaurant to take him to for lunch, doesn't have to be super fancy - just good food and somewhere that can seat 6-7 people comfortably.

He lives in Cheltenham and we preferably don't want to travel far - maybe 15-20 min drive max.

Thanks in advance!