I recall that the vet gave me Advantix once, instead of Frontline. I found that it left a very sticky white residue on their coats, which took a while to wear off.
I also buy online now, as it's much cheaper.
Many thanks, everyone. Will take all advice on board. And while Jake is not exactly on a diet, he certainly isn't going to get too many extra goodies in case he piles on the pounds.
I have used Advantix Booker, Tula and Nubis. It is the most commonly used brand in Spain where I live, more so than Frontline.
They were all find with it, although I found that Tula seemed a bit more itchy than normal for a couple of days. She would lean her back against the wall and walk along it...
I think Advantix protects against a wider range of bites than frontline, such as leishmanias which Frontline don't protect against. Of course Leishmanias does not exist in the UK so you should be OK with Frontline. I have recently changed to a product called Prac-Tic which does all the same things, but is a lot cheaper. It was recommended by my vet who specialises in the breed.
Be careful about exposing your own skin to the stuff. (any of them) They are designed to go through thick dog skin which is a lot thicker than human skin, so avoid bare skinned rugby cuddles for a few days after you have put it on as you could get a bit unwell with nacho etc. Speaking from personal experience here...