The last time i flew SQ i was on the 322 in row 78. I almost missed it due to the crap train i was on from KL. Luckily i didn't have to go to Leeds afterwards though :P
I loved the seats where the base slides instead of the back reclining and charging my iPhone through the USB. SQ Y was one of the best experiences of my flying career. The service is simply amazing. Even BA F service is comparable to SQ Y. Enjoy your time in Leeds. I spent some of my formative years there and most of my family live there. It's OK i guess.