C4 property presenter Kirstie Allsopp has taken aim at The Apprentice host Lord Sugar, describing him as ‘shockingly uncharitable’.

In a series of comments on Twitter, Location, Location, Location presenter Kirstie referred back to when she was a team member on Sport Relief Does the Apprentice in 2008.

She tweeted: “Being asked whether I follow Alan Sugar. I worked with him on Sport Relief does The Apprentice. His behaviour was shockingly uncharitable.”

She then added: “There are words I don’t use, but when it comes to Sugar & his treatment of the staff and crew involved..in any other work place he’d be Fired!!”

Kirstie tweeted her comments after The Apprentice returned to BBC1 on Wednesday night with an audience of almost seven million.

Kirstie is a housing policy advisor to the Conservatives. Lord Sugar was made a peer by the Labour Government in 2009.