The Beds, Bucks & Herts group are meeting at lunchtime at the Chequers Inn, on the old A5 south of Redbourn, Herts. AL3 7AD.
https://www.chefandbrewer.com/pubs/hertfordshire/chequers-inn
There is a restaurant, it's likely to be busy before Christmas. If you want to eat lunch, you will need to book directly with the pub. But the bar and bar snacks will still be available on the day.