I haven't had all that many burgers being GF but this was the best by a long way. Had the South Ken (beef burger, halloumi, bacon, tzatziki and pickled red onion), GF bun for 30p extra, rosemary fries (outstanding) and GF beer. It seems that everything other than the standard buns is GF anyway so nothing is a problem and everything was clearly labeled without making a fuss. Kids menu too with a sensible manageable portion. It was busy but definitely worth the wait.
— Very
— Gluten-free items are marked on the main menu
— Most/All
— Excellent