You need a video capture card (or USB dongle) with composite video input. I can't recommend any particular model, but any cheap one will probably do the job. Just make sure you avoid cards with only digital inputs (e,g, Freeview)
Then you need a lead to connect to the VCR SCART socket on the V+ to the capture card. It will depend on the connectors on the card, but probably something like this
http://www.maplin.co.uk/Module.aspx?ModuleNo=43876
ps. Welcome to the forum!