this car surely wasn't made in 2016, so that plate must be illegal, right? Isn't the rule that you can't make your car seem newer with a private reg, but you can make it older? Can someone correct me if I'm wrong? Anyway, the dickhead took up two spaces, typical BMW driver.
Double white lines where the line nearest you is solid. This means you MUST NOT cross or straddle it unless it is safe and you need to enter adjoining premises or a side road. You may cross the line if necessary, provided the road is clear, to pass a stationary vehicle, or overtake a pedal cycle, horse or road maintenance vehicle, if they are travelling at 10 mph (16 km/h) or less.
Laws RTA 1988 sect 36 & TSRGD regs 10 & 26
This is 100% the bikers fault.