We had a mixed visit this time. Myself and my daughter come here when we can. We had two slight negative situations happen. I get them out the way first. I have a fish allergy, so as always the manager came to take my order however another staff member had taken my daughters order. We both ordered the same Chicken gyoza and ginger +chicken udon noodles. My daughter's food came first and my came a bit later. (This is normal practice especially as the chef has to clean everything to cook my food!) As my daughter started to eat she noticed her Udon meal had a shrimp in it. (There are 2 Udon noodle meals on the menu, one with chicken and shrimp the other with just chicken) The manager came over and took the meal away and got the chef to cook another Udon meal. Not the best, however the situation was handled well by the manager. The second negative was more of a technical one. When you get seated you get told your table number and shown a QR code which takes you to an app to pay.So to you don't have to wait to catch a staff member. At the end, I went to pay and entered my table No but someone's else's food order came up. I tried a couple of times but in the end we had to get a staff member so we could pay. No idea what happened there! Now the positives. Waga:s is our favourite Dad+daughter day out. We love the food and love the O2 venu. The food (when it's right) is the best and comes freshly cooked. The Gyoza's are our go to 'starter' with the Udon noodle Ginger chicken as a main. It didn't disappoint this time. So fresh and piping hot. The female manager (sorry,didn't catch your name) was a delight and extremely polite. Even when I started waffling on about my fish allergy the female manager was polite and attentive. The other members of staff who served us were also polite. All in all a good lunch even with the slight hiccups. The four stars is because of the order mix up!