Everyone has a different view of what "good quality" means.
Kef, B&W, Monitor Audio, Sonance are the sort of brands I think of when somebody asks for good quality, but they aren't £33 per pair
If you can find them have a look at
Flatline RS-650-IC. It's a name you won't have heard before but I rate these really highly. Big name brands are asking close to £400 a pair for the features and build quality you get with these Flatlines at £250. They come with a 5yr warranty too.