At the end of a most enjoyable 3 week 1700 mile trip last May to Orkney and Shetland the clutch gave way at the top of Shetland (I couldn't select any gears although there was pressure on the clutch pedal when pressing and the fork was moving back and forth in sync with the pedal movement) and necessitated RAC recovery to a garage with plenty of Caterham experience of my choice in South Yorkshire. The garage could not source from anywhere a standard Caterham K series clutch so replaced it with a complete Helix clutch part no. 1605 (https://www.demon-tweeks.com/uk/helix-190mm-organic-sprung-drive-plate-hlx70-1605/) along with CRB, cover, water pump and timing belt. Two days later we embarked on another 3 week 1600 mile trip along all of the Outer Hebrides islands without any hint of a problem. (This new clutch was "run in", in accordance with the recommended procedure ie; NO track and no racing starts for 500 miles) So 350 miles to Oban and certainly no thrashing around any of the islands! and back home. It's been problem free since June. Until last week when we went to North Yorkshire for a 4 day tour and when parking up at the pub on the first night I couldn't engage reverse, even after trying neutral. It eventually went in with some clunking!!! I gave the clutch cable some adjustment to give more clearance between the plates with the biting point almost at the top of the pedal travel. This appeared to work OK on the the next morning but after the car was warm (NOT as in thrashed hot) I couldn't get reverse without some clunking. This happened all 3 days. It seems OK when cold but even when only normal road use hot it won't engage. I 'HOPE' I can't imagine the clutch is the problem ?? I will replace my Redline MTL 50k miles old with new Redline MTL although I don't susspect this. (the level was checked OK at last April's service). The recovered plate shows damage to 2 of the springs along with damage to both raised lips holding the springs. The opposite springs and housings are not damaged. In reality the garage suggested that there should be no reason why I couldn't get any gears as the plate is still intact. Everything's been OK for about 2000 miles until this. Any body got any suggestions please?