Looking at the image, the top of the fence appears to be taller than the Portable Lavatory.
So, you're talking about 8ft off the ground.
Not insurmountable, but many would think twice
There's a not insignificant drop that perhaps makes the fence look taller than it is. The lavatory isn't level with the base of the fence!
I've seen people jump the wall (and spikes) so don't think it will be that hard to 'scale'. The existing wall has been jumped using a seat to get up from the inside, or a rather stupidly placed CCTV camera pole that tips down on the outside, thus giving a nice little ledge at the folding point to get a foot up.
This will be a lot easier than the other methods though, but the other methods show just how determined a lot of people are. Can't think why, when they don't have a ticket and (from the occasional police checks) often have other things to hide.
Trust me, there's plenty who don't think twice. The area below is only a couple of feet drop and is about to have a nice concrete slope put there going from the ground to the path to make it even easier to get down. This should (hopefully!) change - plenty of people high up are just as annoyed about the wall and fence being how it is and want it changed - it's more a case of when than if.
The Car Park won't be opening just yet unfortunately, currently expected to be mid next week. Will certainly be a road to avoid for a while though!!
That's good news (the fence bit, not the car park). Any particular reason for the car park not being ready on time?
I must say it looks awesome. Nicely lit (great to see very bright LEDs throughout) and the same can be said for the authentic lighting outside the station that looked great last night. Well done to all involved, even if the old building now looks rather ugly joined on. Are there plans to spruce that up in the future?