Pharmstandard, a Russian drug manufacturer backed by the country's richest man Roman Abramovich, is set to relaunch a London listing less than six months after the deal was postponed amid problems over the company's financial results.

Pharmstandard, which is backed by Chelsea football club owner Roman Abramovich, has said it will float in London before the end of June, just over five months after the company delayed the deal while it reassessed its financial results.