Not that driving without one is all that heinous a crime. Granted you could do without the grief of getting caught, but you've never been all that much of a stickler for total legality when it comes to vehicular matters now have you ;-)

Or, crazy I know, but why not get it MOT'd? Not an instant solution but mid next week for sure, and also an MoT would make it worth much more. If money is a problem to get it through then I might be able to help, depending on the cost of any necessary repairs.