I'm not sure how much help this would be to you in the U.K. but it may provide you with some insight as to some steps or directions you can take.
First off I would recommend you create a resume.
Take your resume to the Jobs and Benefits Center - Unemployment Center.
Have them help you structure your resume. They can also help you find Temp Work.
Some Temp Companies when they see the feedback from the client will help you find a position that is part time to permanent. After showing your capabilitites, people skills, communication skills you may find there is something available to you.
Don't be to picky when it comes to jobs, I've seen people hold out because they felt they should be making 100K plus, but what you think your worth and what a company is willing to pay you is a different ball game as I'm sure most in the field will tell you. Most companies will try to get the most with the least amount of pay, common business practice.
Try out Monster, and the others as mentioned by Digital_Spirit.
Most importantly keep your chin to the wind. Never Stop, Stay Focused, it may not be what you want but money is money. Work it like a stepping stone. You have to work your way up, remember you'll be competeing against others for most positions- Don't get down - keep a positive attitude- don't be fake about it- but think positive. Everyday above ground is a good day.
See if you can get some feedback from some companies regarding what there looking for. AN example would be here
L J Kushner & Assoc. This way you can see what is on the most wanted in the ItSec / NetSec Field.
Good luck to you.