You can create a shortcut for TWOGS on your phones and tablets. Simply go to twogs.co.uk on your device and, depending on which browser you are using, do the following:-
Chrome - tap on the three dots in the top right to open the browser menu, scroll down to Add to Home screen, tap on that, give it a title (TWOGs is a good one), tap on add and you are done.
Standard browser - same as above for chrome
Firefox - tap on the dots in the top right, scroll down to 'page', select 'page' and then tap on 'add to home screen'
Safari - go to twogs.co.uk, tap on the square with an upwards arrow, in bottom row, tap on 'Add to Home Screen'.
Currently, you can only use Safari to add web pages to your home screen, it's not available if you use other, non-apple, browsers.