Don't know if they're any good but thought they are cheap.
Link is to 1 of them but argos do have another
Bush 5.1 100W Blu-ray and DVD Home Cinema System.
This 5.1 Bush Blu-ray and DVD Home Cinema system has a 100w total output.
Blu-ray and DVD player
DVD Region 2.
Upscales to 1080i and 1080p.
Playback compatibility: DVD, Blu-ray, DVD-R/RW, DVD+R/RW, BD-R/RE and AVCHD.
5 channel audio output.
Dolby Digital, DTS and Dolby True HD decoding.
1 SCART input.
Remote control batteries required 2 x AAA (included).
Size H4.5, W43, D25cm.
Energy efficiency information:
On mode power consumption 25 watts.
Standby power consumption 1 watt.
Home cinema system features:
100 watts total power output.
Subwoofer 35 watts.
Centre speaker 13 watts.
4 satellite speakers, 13 watts each.
Size of centre speaker H5.3, W32.5, D9.6cm.
Size of each satellite speaker H100, W9.5, D5.3cm.
Size of each smallboy satellite speaker H32.5, W9.5, D5.3cm.
Size of subwoofer H32, W16.5, D30cm.