He has evolved through a series of Miroku O/U's, his early videos show a MK 38 Trap gun. The Forend and 10mm tramline rib identify it clearly...This model was a popular choice with UK Sporting shooters seeking a 32" "Sporter" before they became a wide spread offering from numerous makers.... The usual treatment involved a lowering of the trap stock and custom choking of the fixed 3/4 and Full choke barrels , or the addition of Teague thin wall chokes.....
I believe he may have been instrumental in getting Browning/Miroku UK to introduce the modified MK60 "High Pheasant" Models to the market...
He appears to be shooting a pair of them in later videos.
They incorporate higher stocks, lightweight 32" IM&F tubes and a 6mm game rib to enhance target view at long distance...
In his most recent video releases he appears to have had custom Monte Carlo Stocks added to this or a similar pair....
These MK60 "High Pheasant" guns have been a runaway success in British game shooting circles....
He is a skilled SHOT no doubt about it.