Hi Nicholas,
I towed a caravan for over 20 years with various cars until my wife said I was too old.
There is a website that will assist. uktow.com
You car's kerb weight is 1678 kg and using the 85% rule, will to a caravan weighing 1426.3 kg. Remembering that your caravan will carry a load - bedding, pots and pans, tins of food etc, and caravan weighing about 1350 kg will be idea.
The 3.0 litre petrol will drag along a weight of 1850 kg, so pulling power will be OK.
I hope this assists, but feel free to ask any questions you need to.
Regards,
Peter.
P.S. The nose weight is OK BUT do make sure that is not exceeded and spend about £15 on a nose weight gauge to check before you set off.