Ive used ecar a couple of times ... you have short term (1-28 days) and pay as you go (month at a time)
really easy and simple to use, I pay £140 a month, im only wanting it for one month so when you want to cancel it ... you cancel it just before the end of that month, if you let it go over the month, ecar will assume you want to keep the policy going for another month and automatically take out another £140 (which is all good providing you want to keep it insured!)........ its handy for starting and stopping the policy whenever you want. You get issued a valid certificate of insurance at the start of each month you have it insured.
yeah as said before, its all online .. best to email. And no, they dont fit anything to the car. You get a quote, buy it, scan your driving licence and paper, send it to them, get your insurance certificate, print it out ........... and away you go!