Hi,
I recently bought a Vector optics 4-16x44 Veyron, similar dimensions to the Discovery Compact. It is also made in China but has a US marketing website. I contacted their sales and they said they would also do free delivery to the UK but advised me that their products usually met with a customs surcharge on entering UK. I shopped around and found the same scope on for the price I would pay plus import tax which was £200, scope was received in 2 days and has a 5 year warranty which will be honoured by a UK retailer!