Here’s a UK port, but does anybody know which port it is?
If you’re not too hot on the names of ports, the bridge in the centre of the pic carries an ‘A’ road, so the road number will do just fine. 
Montrose ■■?
A 92
■■■■! Got here too late,
But the river is … South Esk … How many knew that 
alfa man:
Montrose ■■?
… is the correct answer, we have a winner
The other answers given were also correct.