Hello Sharon,
Your first post was a little misleading as you stated the caravan empty was 1100, you now tell is that is the maximum permissible weight or MPTLM.
As you have both been driving for over 20 years, then you will have a licence which allows you to tow any possible legal combination, so no worries there. (Cat BE)
It is always the best idea to keep the weight of the caravan as small as possible, but in your case you already have the caravan with an MTPLM of 1100kg. The industry recommends as a novice you choose an outfit where the caravan is no more than 85% of the unladen weight of the car. Based on that advice you need to be looking for a car with an unladen weight of 1294kg or more.
There are many cars that will suit that. In a couple of weeks PC will be publishing their tow car of the year, You may find a suitable vehicle there, but don't be blinkered by their choice as its what's right for you that counts.
Do bear in mind that most caravanners do far more miles without the caravan, so make sure its right comfortable and economical for your day to day usage.
Just as a broad suggestion, most of the typical family saloons/estates will manage your caravan, but if you are looking for a little more space them do consider some of the MPVs.
You would have no problems weight wise with a 4x4, but do try before you buy, as the handling of some of the larger vehicles may not suit you.