Ah thank you, came here to research this issue and have just implemented your fix and all working again.

After a less than stellar experience with a UK supplier of acrylic 2-way mirrors I placed an order with these guys for a glass 2-way mirror. Took about 10days to deliver as they cut and ship in batches but it’s lovely quality. Polished edges and much much higher quality than the acrylic crap which cost a few £’s more.

I bought a mirror custom cut for my homebuild frame and 24" monitor LCD and it came to £51.00 with free shipping.

http://www.mirrorsandglass.co.uk/shop/made-to-measure-2-way-mirrors-cut-to-size