Thanks for the response and advice Arman. I have done some testing and have managed to reproduce the quote strings by first sending a message from an iPhone to a Windows Outlook Client. When I reply to the message (via outlook) to the iPhone it produces the quote string order:
-----Original Message-----
From
Sent
To
Subject
When the received message is then forwarded from my iPhone it produces the quote string order:
From
Date GMT + 1
To
Subject
Interestingly, I tested forwarding emails that I had received from colleagues in the US and Australia and every email I forwarded would then produce the GMT + 1 from my iPhone. I will do some testing on the regional settings as advised and see if I can get it to match.
Thanks