rear brake pedal return spring broken - suggestions for temporary botches please

[MrsC_772]

Before anyone asks, no, I've not dropped my bike again and broken it!

It snapped and went ping across the driveway while Andy was giving the Monster a spring clean (I was in the kitchen baking cookies in payment at the time).

In its absence, the rear brake light will be on all/most of the time.

Until I can get to Snells and get a replacement spring fitted, am I better off:
(a) doing nothing - i.e. riding the bike, albeit with rear brake light giving potentially misleading signals to following motorists;
(b) rigging something up with cable ties to try and stop the brake light coming on (my concern is that it will render the rear brake pedal almost as useless as when I first bought the bike before everything had bedded/worn in); or
(c) rig something up with rubber bands.

Anyone had the same problem, or got any bright ideas for temporary fixes/botches?