Pretty certain they didn't. Certainly I remember the surprise/disappointment of seeing ITV LWT ident at 5:15. I don't remember seeing it at all until then except in the Get Ready promo.
I remember too that weekend being intrigued what Thames' would look like on the Monday
If, as you say, LWT were the first and all the regions launched them on that day then presumably they all launched them at 7pm? In which case why would Thames have jumped the gun when it could just be a neat start on the 4th?
We've had this question before; Tyne Tees 'launched' the ITV look after CITV on the Friday as well.
There was no "next" slide before the break into Home and Away, then after the break the ITV Tyne Tees static ident appeared and Lesley Manners said "and now on ITV Tyne Tees, Home and Away". It was a real "WTF" moment. No fanfare, no full ident, no difference in graphics generally, just a change of look.
I missed this, as I was in YTV-land at the time. I can’t believe the launch was so low key - not even the animated ident and jingle!
ISTR YTV launched their new look during the same junction, but played out the ident with (I think) Graeme Roberts quite enthusiastically proclaiming “This is Yorkshire Television, YOUR station on the ITV Network” over the start (chevron part) of the ident, before the jingle and animation began. Mind you, this phrasing varied very little in the subsequent junctions and became “old” very quickly.
For shorter announcements, YTV always used this chevron part of the ident (not really a still) whereas Tyne Tees merely used the IT* still as described above. I assume they didn’t have the means of playing out the start of the ident.
I notice that the actual cut of the jingle varied beteeen companies - fading out at different times, or having a definite end. Would these options have been offered to all companies, who then chose their preferred version?
CEEFAX SUBTITLES BEGIN SHORTLY