You keep the smartcard which allows you to view the FTV channels (FTA channels need no smartcard) which at this time includes ITV2 however there is no guarantee that when OFCOM finally rule on the ITV/SKY "dispute" that the status of some channels in particular ITV2 will not change.
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"The Nac Mac Feegle are, well, they’re like tiny little Scottish Smurfs who have seen Braveheart altogether too many times." Gatecast