@Anih There is a discussion along the lines of this: Should UK be excluded from Europe.
Also, HO’s generally put up a listing and sitters apply. It’s more successful than trying to invite sitters - this approach rarely works, as sitters are not always available or don’t want to do a particular sit to which they get invited. So the odds are better if HO’s put up a detailed and attractive listing and let sitters come to them.