I do agree that it is disappointing that the Long Stay parking cost has increased significantly from last week.
I cannot quite see why there isn't more of a taper from the £10/day to the £40/week charge: it seeming rather unreasonable that you pay as much for four days as you do for seven. What happens if you park for 10 days? Do you pay £40 + £30 or is the weekly rate pro rata per day after seven days?
I also don't understand why Car Parks 1 & 2 (those directly in front of and each side of the station) are now both Short Stay. Surely that's far too much capacity to meet the needs of Short Stay parking. Leaving Car Park 1 as Short Stay and changing Car Park 2 to Long Stay would have seemed perhaps a better idea.