Anybody here able to advise me how to achieve this please?

Thanks

There are 2 ways I know of.

1. Go into facebook app, click on Photo icon, choose the option that says something like "use exisiting" and it will then let you choose from your camera roll

2. Buy the iPhoto app (£2.99) and if you view your photo in that app there is an option to directly upload your photo to Facebook (or even Twitter).

You can either get a personal Facebook email linked to your account to send the pictures across or through the Facebook app.

or use the official facebook "camera" app that lets you upload to facebook without having to go thru the main facebook app.

Not much help right now, but in iOS 6 you can upload to Facebook directly from the standard iOS Photos app

(As well as all the standard iOS apps that handle photos and video.)