Regus is today expected to say that it plans to quit Britain because of the uncompetitive tax regime, taking the toll of corporate departures this week to three.

The FTSE 250 company, which has a market cap of just under £720m, will announce its redomicile plans along with its interim results, following hard on the heels of similar announcements yesterday by asset manager Henderson Group and engineering company Charter – both of which are moving to Dublin, where the tax regime is more business friendly.

The new defections are a further blow for the Treasury which already faces falling corporate receipts because of the credit crunch. The Chancellor, Alistair Darling, has set up an international tax forum and met the chief executives of some of Britain’s biggest companies in May to try to persuade them to stay in the country.

Daily Telegraph