The move to O2 is just another stage in combining O2 and Virgin Media.
At present they only use O2 for signal but the next move is on to O2 and all their systems. Maintaining two systems is expensive when one will do.
About a month before you move you will get a letter saying what deals are open to you. It should not cost you more.
If you are not happy, then you can leave penalty free.
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