It does feel like quite a jarring change to the theme tune, from a simple piano version to a grand orchestral one.
And in a different key too.
But it's far, far better than the synthesised version that's been used for ten years now.
According to someone on the Digital Spy forums a few years back (before they went to brown stuff), Tony Hatch said that he preferred the orchestral version to his original. If that is indeed true, fair to say there's no greater endorsement.
I don't recall them using that end-of-part one theme before. I assume it was short lived. When did the change into this theme (starting at 0:31 if it doesn't automatically start)
https://www.youtube.com/watch?v=foWFwM-Ccy8
Not that long before the time of that clip, around 2005 IIRC. This end of part one/part two theme was used for some time after 1998.
The opening title sequence changed again in 2005 (using the same music). Perhaps the break stings change at the same time?
The break bumper theme changed in November 2004 according to the Emmerdale Wiki (so the piano version was used with the 1998 bumpers for ten months, assuming this date and others are correct).
I thought it was an odd change then (since everything else stayed the same) and still do now, though I'm sure there was a very good reason for it.