Are they actually made there, or is that just their headquarter?. I work in a clothing shop and you would be amazed how many well-known "British" names are actually manufactured overseas. Not suggesting this is necessarily the the case with Joules, I would suggest checking the labelling. Usually if it is made in Great Britain it is advertised on a label somewhere.
Thank you so much for all your replies. I am setting up a small company selling traditional childrenswear and am desperately looking for someone to manufacture good quality clothes. I love my joules stuff and it is great quality. Hence I wanted to know the name of the manufacturer.