I have been in and out of this since it was around late 20s. I think there may be potential in the short/medium term.

50:1 CONsolidation - ~24Nov2016 - now you own 50p shares instead of whatever you bought previously. Sp had been low-pennies - and is today about 97p - DYOR.
+Don't sell what you don't have!
Recent RNS suggests Co. losses have increased this year, so there may start a new falling-away of shareholder value.
Previous Post here was March 2015. That shows investor interest in this lossey business.
EDIT (28Feb2017)-sp 107 . . . interesting that; 2Nov"07 IC was writing about the unfairness given to TRT Investors...sp then about 30p . . . so had the CONsolidation been at that level, today they'd be ~£15 . . . except too many snouts and losses, perhaps?