ITV, CH4, CH5, ITV 2, CH 4+1, More 4,
Film 4, ITV 4, E4, ITV +1.
Interestingly the vast majority of TV Aerials directed towards this transmitter seem not to be affected so I suspect the problem only affects TV Aerials or Aerial systems which may have had a borderline signal strength / quality prior to the fault developing.
Please be-aware that just because your TV pictures on the above channels may have been good prior to this current problem it is not necessarily an indication that your signal strength and quality would have been anything other than just sufficient any slight reduction in signal strength or quality and your reception of that signal will be lost completely, this is known as the "Digital cliff effect"
Regardless of this current transmitters fault it may be worthwhile having your TV Aerial or Aerial system checked, should a fault then be found and rectified it will dramatically reduce the chances of this happening again in the future.
In the meantime don't forget that if you're lucky enough to have a HD receiving TV you can still continue to watch ITV, CH4 and CH5, all of which remain unaffected on multiplex 30, just select the channel numbers 103, 104, and 105.
It's rare for me to offer the following advise (see my previous warnings below in Orange here in my news blogs regarding this) but just so long as you are currently receiving your TV signals from the Bromsgrove transmitter and you do not have problems with any other channels other than the ITV ones (as listed above) then an auto re-tune of your TV may just find a temporary solution by giving your TV the opportunity to lock onto another stronger ITV multiplex from another transmitter.
As soon as the Bromsgrove transmitter is back to it's normal self I will post a blog here in my news section and at that time you may need to auto-re-tune your TV one more time......Watch this space!
UPDATE 11th Jan 2017 - As I've had no recent reports of Multiplex 23 / ITV channels being a problem I can only presume that the recent reception problems have been resolved, please let me know to the contrary.