Taking an age to download film in UHD

[Marvin08]

Just had Sky q reinstalled on Friday, trying to download UHD film and it's taking 40mins now to download 17 mins of the film!.  

Have checked broadband and settings for UHD and all appears fine, any ideas what else I can do? 

[Chodley]

How far apart are your Q and router?

Which ISP?