I agree with you that UK or Ireland are distinct possibilities. The houses in the foreground do have a bit of an Irish look to them.
Here's a little puzzler. The piers holding up the bridge look much too close together to allow a ship of any size through - even the middle two, which are a bit further apart. It's also difficult to see any kind of mechanism that would lift, slide or rotate the centre span.
And yet there's a large ship moored in the distance, beyond the bridge, and you can just see the bow and fore-mast of another one peering into the right-hand edge of the picture.
There seems to be lettering on the canopy(?) of the building with the arched roof just above the lower R/H corner. If I enlarge it a bit and stare at it long enough I can persuade myself that it reads B?RN????GAS CY.