No impediment...

If any man can show just cause, why they may not lawfully be joined together, let him now speak, or else hereafter for ever hold his peace. (As they said in the Church of England)

In Scotland, banns were abolished  by the Marriage (Scotland) Act of 1977 which came into effect on 1 January 1978; instead, both parties are required to lodge marriage notices with the district registrar of the district in which the marriage, whether religious or civil, is to take place.

The names are then published outside the Registrar's Office, so that the public can make objections.  

#3's name enters the lists at the bottom - over the next few weeks it will rise - until the legal time has been reached.