Many thanks once again for the additional support.

In a very strange change of events... I thought when the phone rebooted and the same screen came on above that there was no other alternative startup possible.

When restarting the phone after leaving battery out for 20+mins, then pressing the vol- + home button + power button, normally I would press up to go to the booting screen mentioned above. This time I thought there is no harm in trying the vol- button as in to continue, and very strangely it had the 3D Android man and was installing something, then there was an updated of files, then went onto the other screens and opened normally, it seems like the last installation worked

Many thanks once again and have a great day