Record breaking airport charges increase?

[TWH]

HIAL have increased their charges for the airports that they run in the north of Scotland.
An example:
Basing at Inverness for a week and doing day trips to other HIAL airports for lunch/visits.
In the past:

1. Landing fee Inverness: £25
2. Parking 7 days @£10 per 24 hours: £70
3. Landing fee 1 island per day: 6 x £25 = £150
4. Parking 2-3 hours at each island: £0
5. Landing back at Inverness each day 6 x £25 = 150
6. Total cost approx : £395

NEW Charges:

1. Landing and Navigation charge at Inverness: £50 X 7 = £350
2. Parking Inverness £90 per 24 hours = £630!
3. Landing at each island 6 x £50 = £300
4. Parking at each island as lunch takes more than an hour = £40 x 6 = £240
5. TOTAL cost now £1520

Anyone know of a larger increase?