Found this extract from Tom Sheppard's Vehicle Dependant Expedition Guide
"Think hard first and give careful thought to winch before buying it. It is more than an add-on accessory - heavy, expensive, often requiring uprated front springs etc .........despite knee jerk, not always applicable to expeditions.....think on possible usage - casual, heavy duty, electric seldom suitable......training definately essential......
A winch would have its uses in emergencies such as righting a vehicle that has rolled over of fallen among rocks. A Tirfor hand winch however could be used for this........slow but comfortable".
After much debate, reading and research, plus others input, we've decided to go for a Tirfor, plus long tow (possibly polypropylene) rope (30-50m) with 4.5-6T break strain, towing shackles and rings, hi-lift, air bag, shovel. Also, join the local Land Rover club to see if we can get some training and famiiarisation in before we go to determine how to use properly, what tips and additional bits we might need to prepare us. Hopefully in most instances we can use LR as 2nd vehicle to sort the caravan, if not then the Tirfor, hi lift, air bag - all dependant on angle of recovery which will be important for us. Apart from the weight of a front mounted winch and additional equipment and training to support, we think may end up restrictive (to front only) as well as dependant on vehicle engine, battery etc. Tirfor might be much harder work, but lighter load ultimately and more flex. Otherwise, hopefully we'll be prepared enough not to go alone anywhere that might be dodgy to assist us in more risky situations. Thanks all. Any further comments/pointers welcome.