There can be no excuse for hopping in a cab for Herbert Smith staff in the next month.

More than 220 employees have signed up to a charity walk that will count every step they take over the next four weeks.

Every volunteer will be fitted with a pedometer, with participants aiming to collectively walk as far as Zambia (just short of 5,000 miles from London to its capital, Lusaka), in aid of the firm’s charity of the year, WaterAid.

As well as hundreds of staff from the London office taking part, there will also be contributions from offices in Moscow, Madrid, Abu Dhabi, Dubai, Singapore, Paris and Brussels.

Looks like the firm is stepping up its charity efforts.