Vince Cable is not happy about the proposed carve-up of London seats by the Boundary Commission.
He is not too bothered about the prospect of a high profile election showdown with Tory Zac Goldsmith in the new seat of Richmond and Twickenham.
He believes it is "eminently" winnable for the Liberal Democrats.
But his ire is at the commission for not placing more importance on borough boundaries and the identity of specific communities in the capital.
He told The Standard: “In order to get the right size of constituency, no account has been taken not just of borough boundaries but any sense of identity. That will cause a lot of concern.
“They are re-introducing 19th Century boundaries. A lot has happened since then.”
In 38 out of the proposed 68 constituencies for London, borough boundaries will be crossed. Two will span rivers.
Mark Field, Conservative MP for the Cities of London and Westminster, is opposing the Square Mile being stripped from his constituency.
While Labour former Culture Secretary Tessa Jowell, whose Dulwich and West Norwood seat is being carved up, said: “These changes are needlessly disruptive for the people we represent.”
A high profile Labour clash was mooted in some quarters between former Transport minister Sadiq Khan and Chuka Umunna in the new Streatham and Tooting seat.
But Mr Umunna could seek to contest the new Brixton seat.
Nicholas Cecil
UPDATE: Full Vince Cable quotes on new constituencies: "In order to get the right size of constituency, no account has been taken not just of borough boundaries but any sense of identity. That will cause a lot of concern.
"They are re-introducing 19th Century boundaries. A lot has happened since then.
"It's fair to say there will be quite a lot of unhappiness in the local community."
On his Twickenham constituency: "There will be a lot of concern locally because half the constituency is being taken out of the borough."