We're having a break based in Douglas at the start of July and I wondered if anyone could advise me please of the current situation regarding using a UK mobile phone in The Island. 

Last time we were there, I had to buy a Manx Telecom SIM to use my (Virgin Mobile) phone.

Will I need to do the same this time (still with Virgin, who are about to become O2) or should it work okay as it is? 

Thanks for any advice.