The actual butt slide of a Bren is not a load or pressure bearing part and you can have a box full of them so...... The laws here are just sooooooo long and convoluted with double interpretations placed on them - to suit the prosecutor of course - that to get one of what you want cleared, you'd have to........................ Have you ever heard the phrase 'pi....., er....., urinating into the wind'?

But if some wag started from fresh, using a newly made look-a-like Bren body and barrel that was a single shot crank-and-shoot 'rifle' then it'd be looked at non too kindly and THEN refused! Just my take on things