LONDON, Jan 24 (Reuters) - Britain said it would bring in new rules on hidden fees on online purchases like tickets, forcing sellers to indicate any mandatory costs in the headline sale price.

The government had announced in November that it was planning a crackdown on so-called "drip pricing".

Consumers ordering food for delivery, buying package holidays, airline tickets and concert tickets, can end up paying a higher price than first indicated due to a "booking fee" or other cost which they cannot avoid. (Reporting by Sarah Young, editing by Paul Sandle)