Reading the replies, I have realised that I haven’t explained myself correctly, so I will start again.
I have an update form that has a starthour time, a startminute time, a endhour time and a endminute time where the users enter the relevant times.
I have two labels (TimeStart and TimeEnd) where I have ‘joined’ the starthour & startminute and endhour & endminute together using the following respectively
Text(StartHour.Selected.Value&":"&StartMinute.Selected.Value,DateTimeFormat.LongDateTime24)
Text(EndHour.Selected.Value&":"&EndMinute.Selected.Value,DateTimeFormat.LongDateTime24)
How can I ensure that the end time the user enters is not the same or before the start time?