How easy Wouk it be to replace my standard swing radio in my vrs for a dab radio?

Very easy, its plug and play so there is no wires involved. You will have to install a DAB aerial but apart from that it should work straight out of the box.

I bought this aerial and the reception is exceptional

http://www.dabonwheels.co.uk/Kinetic_DEGA-T4002_telescopic_glass_mount_DAB_car_aerial.html

This guide gives you a rough idea what you need to do

http://how-to-gps.blogspot.co.uk/2012/02/how-to-remove-skoda-fabia-car-stereo.html

The swing is very easy to remove/replace. The major problem is getting a replacement that will fit neatly. If you are happy with the swing otherwise look out for a VW RCD 310DAB on eBay. Works for me

Does the rcd310 have a Bluetooth function?

Thanks

As its (RCD310) basically the same unit as the "Swing", then you can add it...plug and play.