(Sorry if you see this twice - first post doesn't seem to have appeared)

Hello, I've been reading about Feliway spray and/or diffuser and think it is
what I am looking for for my worried cat.

He's a big lovable puddin' but not very brave and the sight of other cats
near our garden makes him nervous. Although neutered and 10 years old he
started spraying in the house a couple of years ago (after getting lost).
We've made him feel as secure as possible and used dried food in strategic
places which has reduced the problem significantly. There is still one
problem area, the conservatory - he loves to sit in there with his sister
(half the size, twice as brave!) but can see other cats, one of whom has
tried to get in when the door is open on a sunny day. It sounds like the
comforting effect of Feliway may help.

I was wondering if anyone here had used it and if they had noticed a
significant difference?

Does anyone know of a good source where I can buy it in the UK as cheaply as
possible? (I've seen the same diffuser advertised at £27.47 and £17.19).

Thanks!

Moi