In reply to FesteringSore:
Our neighbours run a business from home that involves receiving lots of deliveries. We don't tend to get 40 tonne wagons - they wouldn't fit up the lane - but we do have lots of vans of varying sizes, generally three or four a day, dropping off anything from small packages to large items of furniture. The houses are rented, and the landlords know about it, and don't have an issue - the only problem, which happens once a flood, is that a delivery wagon is in the way when we want to get into or out of the shared drive. We've talked about it with our neighbours, so we all know where we stand - they know we'll sign for deliveries for them and store things if necessary, and they'll do the same for us. One of our cats has become a shared cat, and they help us out with gardening issues (and tolerate our crazy dog), so it's all blissfully harmonious - I do recognise this is a very fortunate position to be in!
I think if it's causing problems I'd try to talk to them first, and then investigate planning regulations - though as other posters say, maintaining good relations with neighbours is something one should always strive for, because the alternative is rarely good.