The country's first ever Green MP is to step down as leader of the party.

Caroline Lucas made history in May 2010 when she won the constituency of Brighton Pavilion at the general election.

Ms Lucas has now confirmed she will not be seeking re-election for another two-year term as the head of the national party when the current reign ends in September.

She said she would concentrate on her "very demanding" role as MP for Brighton Pavilion.

A party spokesman said it was to "broaden opportunities for the range of talent in the party and to raise the profiles of others aspiring to election".

Dr Lucas, who was the party's first ever leader, said: “I look forward to continuing to do all I can in my very demanding role as the MP for Brighton Pavilion, representing and helping my constituents in Brighton and defending them against the Coalition Government’s disastrous economic policies and its refusal to accept its environmental and social responsibilities.

"I will now also be able to work more on the political frontline, putting the Green case for change in Parliament and in all circles of national political debate."

Reporter Tim Ridgway will be talking to Ms Lucas later today. What would you like him to ask her?