That Yogi looks the spit of those old Tommy Dobson dogs. I must admit I like the Bedlington/Lakie hybrids - The best dog I ever had - Solo- was a Lakie/Beddy and he was the best dog I ever owned -Fox,rabbits,rats , and more - if Spike is half as good I'll be happy.
Incidentally - there is a picture of Solo in J Glovers book (page 86).