“We were at the edge of divorce when I decided to try this. Years and years without delight of orgasm and sexual satisfaction. This could ruin any life but not ours. Viagra worked and I always keep the pill near my bed as nobody knows when my wife asks ...

“Honeymoon returned and my husband feels like a teenager again. His erection is the same as at our first date 30 years ago. He feels like a man again, his penis is hard with a big head so he can be proud of it again. Viagra really helps.”

Costs are spiralling out of control as unregulated private providers capitalise on demand, say managers.

The disorder may affect hundreds of thousands in the UK, but many face delays in getting a diagnosis.

Hundreds have fallen ill with salmonella infections in an outbreak linked to imported eggs.

Close to 500 people have become ill with salmonella linked to imported eggs, say UK authorities who are investigating more clusters.