St John's fish burger

I ended up at St John's for the second saturday in a row to watch the rugby. I decided to try the fish burger from the Rockwell & Sons pop-up burger tent. Similar to the beef burger ('double smash patty'), the bun was excellent. There were nice red onion pickley things and cheese too. The fish was fresh. I thought the condiments (a kind of tartare sauce) made the dish quite rich with the battered fish. But apart from that, no complaints. Delicious tater tots accompany this dish 4.1/5 [NB - I am aware I am reviewing a second burger from the same establishment, and Rockwell & Sons is not formally entered in the Burger Wellington competition but is instead a WOAP special event/meal option. But the burgers are so good! Like fancy BK.]