The Virgin EPG
lists the 15/9/92 episode (the first to use the new titles and music) as being next Friday.
Probably needed to be changed anyway, the woolpack shot has been out of date since early 1991, and the farm shot at the end of the titles and under the credits would have been from early 1993 when they have to move due to subsidence.
Several shots from the 1989 titles do appear in the 1992 titles. And the 93 and 94 ones, all have footage from the previous ones. The 1994 titles also rather curiously have a shot of a helicopter taking off which comes from Chris and Kathy's wedding episode in 1991.