erm….
Xaar used to work there. Share price dropped due to credit crunch but they are doing pretty well – selling loads of printheads to China & the like. Currently in the process of transferring a load of manufacturing over to the UK from Sweden to cut costs.
Tanfield – I bought some of these ages ago (they were 58p) and I sold them when they were over twice that. They were steaming ahead with Smiths Electric Vehicles, but as the credit crunch loomed, no one wanted to buy expensive (and slightly unproven) electric delivery vehicles. Once the recovery picks up, I would expect them to recover. They also own Upright who were hit by the American housing issues. When that market picks up, they should start doing OK too.
Pursuit Dynamics – Interesting technology & could be massive if they ever break into the markets they intend to. Share price has yo-yoed quite substantially.
Erm…..don't take my word for it though. I also bought £500 of shares ages ago in a company that are now worth about £30.