The bikers say their main aim is to raise awareness of the charity

The group, who work at Scott's nightclub in Wrexham, rode 2,500 miles to Real Madrid Football Club in aid of the Wales Air Ambulance.

Bikers Simon Eve, Mark Smith, Ray Grice and Carl Dodd were sleeping on Monday after their 48-hour marathon.

Early estimates suggest they have raised several thousand pounds.

There are not many people who would embark on such an arduous journey for charity Anna Evans Wales Air Ambulance

Wales Air Ambulance fundraiser Anna Evans said: "What they have accomplished is a real triumph.

"They pushed themselves as hard as they could, and they are all absolutely exhausted.

"We're just glad they made it back safely, which is the main thing.

"They have done wonderful things for us, and of course raised loads of money."

48-hour target

The men left Wrexham on Friday night for the Channel Tunnel, travelled through France, the Pyrenees, and across central Spain to Madrid.

All four riders were back in Wrexham on Sunday night - just outside the 48-hour target.

But they were given a warm welcome when they rode into Wrexham.

Anna Evans said: "Simon Eves arrived back at 7pm on the dot. The other three were all back by 8pm, so they weren't that late.

"It's a remarkable achievement for all of them.

"We had a big welcoming party for their return - it was a really emotional night."

The air ambulance gets no cash from the government, we just want more people to be aware of it Simon Eves

Explaining why they took on the challenge, Mr Eve said: "The air ambulance is forever helping bikers - we thought, why can't bikers help the ambulance?"

"We did a run to Paris and back last year in 24 hours for a bit of a jolly, and because we did Paris and back, we thought we would do somewhere a little bit further for charity, so we set ourselves Madrid."

The cost of providing Wales with a full air ambulance service is �2m a year, which is met entirely by donations.

The charity says the air ambulance is very important to the large rural population of Wales, as it can quickly reach areas that are difficult or even impossible to reach by road.

Although the sponsored motorbike ride has raised money, Mr Eve said they were equally keen to raise awareness.

"We were asked in the early stages how much we are aiming to raise, but the cash is just a bonus.

"The air ambulance gets no cash from the government, we just want more people to be aware of it."