Problem with apps on iPhone IOS 9.0.2

Hi

I have a number of apps that have run perfectly on the iPhone to date.

I just updated to IOS 9.0.2 and now they open to a black screen. If I double tap

the home button it shows as a pane with a mini icon and the app name so it would

seem to be running.

Has anyone else come across a similar problem and found a fix?

Cheers

Richard