problems syncing photos to icloud
I've recently changed devices from an iPhone 4s to iPhone 5. I backed up my iPhone5 from iCloud so everything was transferred over without any problems. However I am now finding that new photos taken on the iPhone 5 are not uploading to my iCloud. Everything that should be on in my settings seems to be on (iCloud/Backup etc) and when I log in to my iCloud on my PC and check the settings there, the device it picks up is the iPhone 5. The same goes when I log in to my iTunes. So I'm not sure why this is happening. Am I missing something?
iPhone 5, iOS 8.4.1