Hello, I'm sorry Martin hasn't come back to you, do you still require assistance with this concern?
Let me know and I'll reply as soon as I'm able to.
Unfortunately at 30000 miles and 3 years old a clutch failure would be classed as wear and tear by Ford but you can try a few options. The exception to this been wear and tear would be if the failure was caused by another component, either the slave cylinder leaking causing contamination of the clutch or if the dual mass flywheel (DMF) had failed causing the clutch to start to slip.
Ask the garage if the DMF is OK as it's not uncommon for this to fail on this engine.
If the fault is the same as it was a couple of months ago I'm surprised the garage couldn't reproduce the concern and identify it then.
If the garage are adamant it's wear and tear you could try speaking to Ford customer services and ask for a goodwill contribution given the low mileage and age of the car, tell them you don't think it's acceptable for the clutch to last such a short time, tell them you don't use the car for towing either. Ford customer services number is XXXXX
Start with the above points, let me know if I can assist further or if you have more questions regarding this and I'll reply as soon as I'm able to.
I'm glad I could help.