@geordie85 @Andy ES unfortunately turning up before it gets dark isn't going to possible until later in the year, as it's already dark by 4pm here, and I don't finish work until 5pm and still have to get home, cook dinner, walk the dog...etc.
@Gfamily I already thought about the interior light, and mine can be switched so that it doesn't come on when the door is open.
@Sunshine yes I thought about switching the car lights off, but wouldn't that be a bit dangerous? Especially if it's a place that is very dark. I guess half beam would be a good compromise, but still has the potential to spoil other people's night vision.