Foxy - - if you're going down the Trent, please, please, ensure that your boat is equipped with a suitable anchor & chain & rope, you really really should wear a working lifejacket (not just a buoyancy aid), and either you, or the person(s) travelling with you, should be able to use, and equipped with a VHF radio.
You should also be certain (presumably from the seller of your boat), that there is more than sufficient fuel aboard, that there is no diesel bug in the tank, and that a mechanical inspection of the craft suggests that it is fit to travel on a tidal river.
You must get copies of the Sissons Charts for the Trent - - with currently lowish water levels you run the risk of running in to shallows if you don't know the correct channel to steer.
(You also need to book passage through Keadby lock 24 hours in advance - Cromwell Lockie will help you do that)
If this is your first journey on a narrowboat - please ensure that you are with an experienced boater on the Trent. It is not to be trifled with.