Just established after probably 2 months with no handbrake, the cable had slipped out.
Managed to get under it today and put it back on. Handbrake felt baggy, so tightened it using the adjuster above the exhaust.
Great! 4 clicks at full resistance...
Problem... Handbrake is still completely ineffective no matter how hard I yank on it. Hydraulic brakes all round are fine.
Any ideas lads? MOT due Tuesday and looks like its gonna be out of action now for another week unless I can bend my head round this issue.