Brian Blessed to accompany Glastonbury Festival goers on the toilet

The booming voiced star is one of three celebrities who have lent their voices to talking toilets which will be used by thousands of music lovers at this weekend's festival which gets underway tomorrow and is expected to attract 175,000 people.

The "babbling bogs" have been installed in the Pyramid Stage field to highlight the 2.3bn people around the globe who have no access to a basic toilet.

Actress Kathy Burke and musician Cerys Matthews have also lent their voices to WaterAid's Toilets Save Lives campaign.

WaterAid's Marcus Missen said: "Who hasn't wanted to listen to Brian Blessed while sitting on the bog?"

Billed as the "swankiest" and "best seats in the house", the talking toilets are among more than 5,000 loos being installed across Worthy Farm ahead of this year's festival.

They are being used by the stars to share the "huge problems of not having a toilet".

One of the talking toilets also has a "daunting two-way door" which appears see-through to the person inside but as a mirror to those on the outside.

A spokeswoman for WaterAid said it was designed to make the user feel "exposed" to highlight the one in three around the world who have "nowhere safe to go to the toilet".

"As they use the loo with a view, they'll have an epic view out to the Pyramid stage crowd," she said.

"Yet they'll also have to grapple with feeling visible to all outside, with their trousers down, whilst those waiting check their reflection."