An Insulate Britain protester who had to be removed from the roof of a DLR train by police is actually married to a Transport for London boss in south London, it has been revealed.

Cathy Eastburn, 54, has been arrested multiple times for blocking the M25 during recent protests and is known as a prolific climate activist in the UK.

Her husband is Ben Plowden, 58, and was a director in TfL's surface transport team, previously also an environmental campaigner with the Living Streets charity.

Mr Plowden has spent the past 20 years as a TfL director and most recently has been overseeing plans to adapt its buildings to changing work practices resulting from the pandemic.

TfL said on Tuesday that he was leaving the organisation at the end of the month. His departure is said to be unrelated to the revelations about his wife.

A TfL spokeswoman said: “We do not comment on the activities of the families of our staff.”

The High Court was on Tuesday set to review injunctions issued over the past fortnight preventing protesters targeting the M25, TfL red routes and the Port of Dover.

Ms Eastburn, who lives with Mr Plowden in south London, told the Daily Mail: "“As you already know, my husband works for TfL.

"I’m working as an activist, if you want to call it that. But I’m just a human doing my best.”