Don`t buy poundland brushes , they are terrible, bristle loss can still be a problem.
Ditto with fleece rollers, cheap ones leave half the fleece on the paintd surface :-(
Toolstations no brand No Loss Synthetic brushes are decent with long bristles.
Pro painters use Brush Mates and never clean their brushes
Toolstation, really not a shill, do both Brush Mate and Store and Go and Clean and Go