I wouldn’t bother forking out £200-300.
Go on AV Forums and have a hunt around.
Decide if you want bookshelf or floorstanders (which will usually give you more bass) and more sensitive speakers with a signal/noise ratio of 90db+ will give more volume.
There’s a nice pair of B&W 602s on there for £120 for starters.
B&W 602
Otherwise, hunt around for Kef, Mission, B&W, Monitor Audio, Mordaunt-Short etc and you’ll get something good. Get some reasonable cable too, nothing fancy but reasonably heavy OFC Copper would be good.
Most sellers will happily send by courier and the general level of honesty and good trading on there is great.
OR – what speaker2animals said. Sounds like a bargain!