I found this a few years ago & thought it may throw some light on this thread:
The first white Lakeland Seamus say was back in the late 1970's, at his friend, Gary Middleton's home. It had been bred from two black-&-tan Lakeland terriers & was obviously a 'throw-back' to many years before when white terrier blood was introduced to the Lake District. Very possibly this happened in the village of Patterdale, most likely through a white Fox Terrier dog that had mated with Lakeland terriers. White terriers would start to appear in various litters then, even though the parents were