Newcastle Brown Ale

I was stationed in Catterick in the 70’s, used to go out to Darlington for night out sometimes, drink Newcastle Brown Ale. Loved it.
Fast forward to the 90s, professional musician, 10 day run in the north east.
First place I played I asked for a bottle of Dog in me dressing room for when I came off stage.
Yep, there it was, a bottle of Dog!
Took a big gulp straight out of the bottle, immediately thought "■■■■■■■■ have changed the recipe!!
It tasted I dunno, thinner?
Anyone have any info on that?