Can anyone recommend a good flea bomb that they have used and worked effectively.

There are a few on the market, but expensive does not mean the best.

Any ideas please.

Yes . The drink Raki or as its called here on Rhodes Suma.
Its a strong grape drink flavoured with aniseed.Similar to Sambuca. Just brush some on the cat or dog.Fleas will die & the treatment will prevent any further fleas

If you go to your vet they should sell a spray called indorex for the house, fantastic stuff works every time.

Beware of flea spray that contains PERMITHIRIN! This pesticide is fine for dogs but not cats. Its dangerous for cats.

The animals should never be there when you spray, we spray the house once we have the dogs in the car and we are going to be away for the weekend, when we come back it's safe. Many of these sprays are not safe for humans to breathe either BTW.