See above post assuming you have a TV + On a budget of that size you can get yourself something with ease. Though not necessarily the best, you can upgrade, the following is just an example within your budget & NEW.
A Sony STRDH820 amp for £220.
A sony Blu-ray player BDPS185 £65.
Some speakers to go with it, the Boston Soundware XS SE at £220 Total £505. Or the Tannoy SFX 5.1 at £200 Total £485
Alternatively on the speaker side, if they are not big enough for you, buy a good centre speaker & a stereo pair so you would have a 3.o system. Or just a subwoofer & stereo pair a 2.1 system or just a decent stereo pair. Either way this will give you something to build on. Dont forget to audition them if possible & to include the cost of cables & connectors, these are all upgradable in the future.
Regards . . . . Paul