AN athlete’s latest incredible charity challenge will see her run 145 miles from Birmingham to London in less than 45 hours.

Liz Tunna, 25, from Little Sutton, is one of 80 ultra-runners signed up for this weekend’s Grand Union Canal Race.

As a veteran of 121 marathons – including 10 in as many days last year in aid of disadvantaged children – her preparations could not be better.

But even she admits the event, which has a 45-hour time limit and forbids competitors from stopping for more than 40 minutes at any one time, will be her toughest yet.

Liz said: “It will be the equivalent of completing five-and-a-half consecutive back-to-back marathons and competitors notoriously experience hallucinations on route due to being awake for so long – which is sure to be interesting!

“I’m pretty scared about undertaking this although I have roped in some runner friends to act as my ‘support crew’ and provide me with food, cups of tea and lots of energy during the race.

“I have always wanted to attempt this event for the sheer challenge of it but I thought it would be a brilliant way of raising money for Claire House Children’s Hospice.”

Liz, a former Whitby High School student, became the youngest female in the UK to complete 100 marathons when she crossed the finishing line in last October’s 2011 MBNA Chester Marathon.

Since then she has taken part in a number of events including the 53-mile Malvern Hills Ultra earlier this month and, at the beginning of March, the abandoned Thames Path 100 from Richmond to Oxford.

Liz, who only started running five years ago, said: “Unfortunately the weather was against us and some runners were hospitalised with hypothermia.

“I reached the 95-mile check point with three hours time limit left to complete the race and the organisers were forced to cancel it.

“I was recognised as a finisher since I had so much time left to complete just five miles but it was devastating to get so far and then not cross the actual line.”

Liz warmed up for this weekend’s Grand Union Canal Race by running the 2012 Brathay Windermere Marathon on May 20.

If you would like to sponsor Liz Tunna’s Grand Union Canal Race run you can do so online at