This is a single trigger, ejector gun, MX 27E-IC, fixed chokes but the full was taken out by a local barrel maker to be improved, the other remains as half. It's been well used, with plenty of marks and dings to show for it, but has been cared for, cleaned and oiled, and stored in a safe with a desiccant to keep it dry.
£200 seems sensible money for such a weapon, it's available for viewing near Reading.