Just paid £9.45 for one Stronghold flea treatment at my vets and realised thanks to mumsnet that you can buy this online for £3.83. Feel a bit fleeced by my vet and won't be buying it from them in the future!!!
Just wanted to pass this on in case others may benefit. As I have 2 cats buying this way will save me £135 over the year and £2,025 over a lifetime assuming my cats live to age 15.