Thanks guys for your replies. That is strange that they never came with a boot release. I have a mk2 Golf. I did think of using the choke blank off as it was the only place I could see that a switch wouldn't look out of place. I see there are solenoid kits for sale on ebay for £14 and I just need a nice looking dash switch. But I will check out the breakers this weekend for a Hyundai to see if I can use the solenoid and switch.

Thanks.