Originally Posted by tdenson: “Bit of rubbish coding which rejects a phone number with a space in it”
It is called input validation, it means that when they go into a DB the numbers will work if you extract them or query the DB in order to send SMS. Admittedly they could have taken the spaces out after input, but why put spaces anyway.
It is an external ad agency running the campaign on behalf of Three anyway, hence the different domain.