Trevor,
Just a few thoughts. Did your caravan come with a spare wheel on a carrier at the rear of the axle, and if so have you removed it for any reason?
Is your hot water heater at the front of the caravan and if so is it full of water?
Are you sure your noseweight gauge is giving a correct reading?
You could try measureing your noseweght with a set of bathroom scales, as i do, making sure your hitch is at the same height as it would be when hitched.on your caravan.
Have you tried putting your awning under the island bed and as near to the axle as possible, not at the rear of the bed.
From looking at the layout of your caravan, you seem to have only the island bed and two wardrobes of any significance behind the axle. Your fridge is slightly in front of the axle, plus heavy bunking at the front.
Therefore you will have to load under the island bed, and both wardrobes to stand any chance of getting your noseweight below 100kgs.
If your loo is behind the axle you could half fill the flush tank.
Hamer