Simplify this complex formula I've come up with for sorting mixed format time.

Hi FDibbins
I just opened my account here, for this thread in fact, and am not familiar with the forum. Please could you help me in telling me how I can upload a workbook? Thanks. A lot of the buttons above my reply box are greyed out, I thought this may be because I am a new member and don't yet have enough posts to post links and files etc. as I know this is how a lot of forums work.