Hello Sand,
There were around 452 internment camps in Britain so it may be a bit tricky to find out exactly where he was sent. That being said there were very few internment camps for families. As far as I am aware Isle of Man was only for civilian males. It may be worth checking the local papers in Leeds first as they tended to round up 'Aliens' in groups especially if they were transferred.
There is the Internment Research Centre in Hawick [I am the archivist there] but it is still a work in progress and the archive is still being built. It was only launched in November of last year. There is a map with the camps on the website which is still being added to if that helps stobscamp.org/irc.
Sorry to not be of more help at the moment.
Best of luck in your search,
Hannah