While mackeral is an option it's their chicken and lamb that seems most popular. Various options are available including wraps, sandwiches, boxed meals with salad and rice (or chips) and so on. I had the lamb and rice box for £6.50 and enjoyed it but I wouldn't consider it to be stand-out compared with the same sort of thing from other vendors nearby. It was very busy so service was a little delayed and seating incredibly limited but it's worth a go if you happen to be in the area.