UKTV G2 seems to be going off in alot of places in Dublin which is where I presume you are,mine was off for a few days too and just cam back on by itself yesterday.You can try entering the frequency for it manually here's the frequency for it:291000. It's more than likely a fault where you are you'll probably just have to wait for it to come back as is what normally happens.
Lost a few channels myself, living+1, nick, gold+1 etc.. They all seem to be on the same frequency. Have been reliably informed if you do a channel search you will get them back.
