Having a bit of a random issue and need some help please lads. MK1 Fab vRS.

Started yesterday morning. 
Car will audibly beep 3 times loudly with this the ABS, traction control and handbrake light will come on and go off, my stereo will turn on and off and I'll momentarily lose the back light on my dash.

It's happening randomly for example yesterday it did it for the first time as I pulled into works car park, didnt do it all when I was driving home and then its done it 2 or 3 times this morning about 20 minutes into my journey. No noticeable loss of power or anything.

Any ideas? Thanks guys.

The randomness of it suggest to me it could be moisture/bad contacts somewhere, possibly your instrument cluster. That is quite a guess though

Check battery and earth connections for tightness, clean and grease connections where necessary.