What could UK merger between Vodafone and Three mean for customers?

As competition watchdog looks poised to approve tie-up, questions raised over what it could mean for prices, competition and investment

• Vodafone and Three merger could get go-ahead, says watchdog
• Nils Pratley: Regulator's backing for merger is a fair call

The competition watchdog has said it could give the proposed 15bn merger between the telecoms companies Vodafone and Three the green light, provided they agree to certain conditions.

The Competition and Markets Authority (CMA) has been looking into the deal to protect customers from price rises to their mobile tariffs and to make sure competition in the telecoms market is not reduced.