According to Sky's on-screen TV Guide and the official Nickelodeon UK website, Nickelodeon UK changed slightly changed the broadcast times for Nickelodeon UK and Ireland, Nickelodeon HD UK, NickToons UK and Ireland, Nick Replay UK, and Nick Jr. 2. on Monday 30th April 2012.
Nickelodeon, Nickelodeon HD, and NickToons now start-up at every morning at 3am and closedown at 12am the following morning.
Nickelodeon UK's preschool channel Nick Jr. 2, which is a sister channel to Nickelodeon UK's first preschool channel, Nick Jr. UK and Ireland have also extended their broadcast hours and now broadcast on-air everyday between 3am and 12am the following morning.
Nickelodeon UK and Ireland's plus one (+1) timeshift channel, Nick Replay UK, has also changed it's broadcast hours in-line with Nickelodeon UK's broadcast time changes, and now broadcasts everyday between 4am and 1am.
Nickelodeon UK and Ireland, NickToons UK and Ireland, Nickelodeon HD UK, Nick Jr. 2, and Nick Replay UK and Ireland still broadcast "Teleshopping" during each Nickelodeon UK channels' downtime during the early hours of the morning between 12am and 3am.
Before Nickelodeon UK changed the broadcast times of Nick UK and Ireland, NickToons UK and Ireland, Nickelodeon UK HD, and Nick Jr. 2, Nickelodeon/HD and NickToons used to start-up every morning at 2am and closedown every night at 11pm, while Nick Jr. 2 broadcast everyday between 6am and 10pm.
Nickelodeon UK has made no changes to Nick Jr. UK's broadcast times as the channel already broadcasts 24 hours a day seven days a week.
Due to Nickelodeon UK's change in broadcast times, the Nickelodeon UK made series, "Summer In Transylvania", which used to air on Nick UK every morning at 2am (3am on Nick Replay UK), has now been removed from Nickelodeon UK's programming line-up.
Nickelodeon UK and Ireland briefly extended it's broadcast hours started broadcasting 24 hours a day for a week in September 2011.