How many women can a Mauritian man marry in England?

If its only a civil marriage then one wife legally. Muslim men are allowed to marry up to four women with the consent of the first wife but in the eyes of the English law the other wives will not be recognised as a legal spouse. You will need to bear this in mind if you decide to have children as it can pose a problem.

Legally, the law will apply to a Mauritian man as it does to a local Englishman - which means only one wife.

The law in Mauritius is very similar to that in the UK. So a mauritian will only be allowed to marry once; a divorce will be required from the previous wife if he wants to marry another woman.

That's as far as the legal side of things is concerned. However if a religious marriage is performed, then that's completely different. For example, muslim men can be married to many women at the same time under the islam religion.