In reply to Jamie Wakeham:
The only equipment I owned when I started out trad climbing were a pair of second hand shoes bought for a fiver on eBay, and a chalk bag that I won in a raffle.
I'm sure there are many on here who started with similar.
I don't really do any trad climbing anymore but nearly all of my rack was purchased second hand and didn't come close to £300 in total cost.
An additional £5 per day can be a significant portion of the cost of a day's climbing for many people and can easily be the difference between what is and is not affordable. The majority of people working within climbing do so for minimum wage or not much more and many start out climbing as a student with little/no income.
This does not excuse parking inconsiderately. If you can't/don't want to pay for parking, there are plenty of places where you climb and park for free without causing any issues.