Car tax and imported cars?

On reading on some of the comments regarding car road tax I came across mention that on an imported car the first registration date for the calculation of road tax was the date that it was registered...

Is a Japanese imported BMW 5 Series worth considering?

I'm looking at buying an E39 BMW 5 Series. Several I've seen online from dealers are low mileage Japanese imports. Should I avoid these or are they okay to give serious consideration to? I guess I'm concerned...

Why do the Rover Minis re-imported from Japan attract lower prices than those not re-imported?

Why do the Rover Minis re-imported from Japan, which are apparently in excellent condition, attract much lower prices than those not re-imported?

My son wants to buy a classic car in Morocco and drive it home to the UK - what are the pitfalls of him doing this?

My son is a student on a year abroad in Morocco. He's fallen in love with an ancient Renault 4 (left hand drive). He wants to buy it and drive it home to the UK. What are the pitfalls of him doing this?