Mirafit do solid equipment
I have this, it's rock solid and comfortable: https://mirafit.co.uk/mirafit-m2-adjustable-weight-bench.html
And a bunch of different sets of these: https://mirafit.co.uk/mirafit-dumbbell-hex-weight-set.html
Might be able to get a set of cheaper dumbbells from somewhere else if you want to use 75% of your budget on the bench.
I've seen on Hotukdeals that the mens health benches are decent for the money although can't speak from personal experience.
Edit: Finally here might help https://www.overclockers.co.uk/forums/threads/official-home-gym-building-thread.18270342/page-130
Mirafit do solid equipment
I have this, it's rock solid and comfortable: https://mirafit.co.uk/mirafit-m2-adjustable-weight-bench.html
And a bunch of different sets of these: https://mirafit.co.uk/mirafit-dumbbell-hex-weight-set.html
Might be able to get a set of cheaper dumbbells from somewhere else if you want to use 75% of your budget on the bench.
I've seen on Hotukdeals that the mens health benches are decent for the money although can't speak from personal experience.
Edit: Finally here might help https://www.overclockers.co.uk/forums/threads/official-home-gym-building-thread.18270342/page-130