IT is 37 metres long, weighs 300 tonnes and has its own hot tub, dining room and bar.

M4 is the biggest boat to grace this year's Southampton Boat Show.

For anyone not short of a few pounds, it can be all yours for a cool £11.5m.

The latest mega-yacht from south coast boatbuilders Sunseeker is the ultimate indulgence for the affluent yachtie.

Three decks boast five en suite cabins with enough space to sleep 12 guests, and an endless amount of space to kick back and relax in complete luxury.

The main deck features a large lounge decked out with all mod cons including pop-up television screens and a £300,000 sound system.

Each of the five cabins are decked out to the highest specification, with the master bedroom leading the way.

If you happened to want to watch your favourite programmes while brushing your teeth you can do just that thanks to the flatscreen television installed in the en suite bathroom wall.

Up the spiral staircase another level sees a huge saloon kitted out with a plush dining area and yet another lounge.

Up another set of stairs and you emerge on to the sky deck, an area designed with the sunbather in mind.

A sit-up bar flanks the side of the deck and further towards the bow a hot tub is sunk into the floor. And in the ultimate touch of indulgence, special water jets are mounted on the flybridge to coat sunbathers with a fine mist in case they overheat.

Sunseeker spokeswoman Gemma Langridge said: "It's the largest semi-custom motor yacht ever to be built in the UK and the specification speaks for itself."

n For a tour of M4, log on to www.dailyecho.co.uk/video.