You can show the date time in simple text.
Are you in the BST-timezone? If so, then you can use any DateTime-attribute which you fill with the currentDateTime.
I hope I understand your request correct but you can setup your date format for the application under settings in the project explorer. You select the language tab and edit your language to have a custom date format. However, if you want to use time zones sign into your app and under account administration change your time zone to the chosen one. Your profile should use the time zone you want.
You can change the application timezone from your Project App Settings. Go to your project app settings → Runtime and select the time zone you required from the list.
Hopefully, this change works for you.