I participated in Learn To Skate and absolutely loved it. It took me just over a year to complete, although I was slower than most, not having had any skating experience prior. I got stuck on spins and twizzles for months, making no progress at all, until one day, out of nowhere, I got both my spin and twizzle ticked off in the same lesson and finally passed LTS, moving on to Skate Stars.
If you're participating in group lessons, it's worth finding out how large the groups are. If there are more than 10 people in the class, you're potentially getting less than 3 minutes of coaching per week. Individuals in 1-on-1 coaching progress much faster (and are more exhausted at the end of their sessions), so there's a point where 1-on-1 can be better value.
I enjoyed every lesson and looked forward to it each time, with skating becoming a major positive aspect in my life and leading me towards a healthier lifestyle in various ways. Despite being the only older man in a class of younger women, I found the atmosphere to be fun and welcoming.
I would recommend them, but if I were at Alexandra Palace, I would want coaching from Marika. She's an Olympic ice skater, and her YouTube coaching channel is amazing. I don't know if she does LTS, though; in her YouTube videos, she's usually wearing an iceskating.London logo.