yes they have efpos

No. They don't have nuggets. Hamburgers, yes.

You can but seating is limited as it is basically a take away

I never had that. You should of complained if so. I always had excellent burgers from there xxx

Yep

Pretty sure it's just regular mayo.

I don't understand i thought it was there as an attraction and for people to dine in privacy and not in the cold.

I don't think it's BYO (pretty sure it's not licensed at all), I doubt they will do bookings either, it's a very casual outdoor stand up dining type thing, there's very little in the way of actual service and seating is pretty limited.