So, went to try on jeans today in M&S. I am a 5 ft 6 height, always been regular length.
Tried on regular length jeans, and they are too long. Happened to have a short pair in the changing room with me anyway and they were spot on.
My mum, who was also trying on jeans, wear a short length and they are too long for her. She's 5 ft 2. There is no extra short term length.
Spoke to a staff member and yes, they have changed the leg length but not advertising it. "Yes, lots of people have been caught out and complained about it!"
So beware if you are ordering or trying on and take a shorter than normal length in with you.