Hi Boothy if you've got a local collector for the bike then go for it as 18" will be a bit too big for she who must be obeyed,but thanks for waiting for me.
If anyone is interested I also have a Saracen Hardtrax of similar design available. I have been using it on and off for the last 15 or so years right up until Friday night (26 August). Saddle, brake blocks/cables and tyres are the only things that have been replaced.
Free to collector as long as it is going to a good home.