As other have said you can get a V+ box to work with a surround sound amp.
You have to use an optical (Toslink) cable to link between the V+ and amp, then set the HDMI override to On. However VERY FEW channels actually use the 5.1 feature, mostly it is just stereo. May be more of the HD channels will start to use 5.1
I can confirm it does work. TOSLINK cables can be had from Amazon for a few quid
http://www.amazon.co.uk/s/ref=nb_sb_...=toslink+cable
DO NOT pay the £10+ plus you are charged on the high street in places like Maplins.
SCART DOES NOT support 5.1 as surround sound was never part of the SCART standard, this is not VM's fault.
Hope this helps,