Try changing the oil, paying great attention to manufacturer's recommendations. Could be oil is way too thick and is sticking things that are supposed to slide, until it warms and thins.
Testimonial: "thanks for your advice."
Sorry, I am slightly scratching around - except that evidently engine heat and/or gearbox heat is changing something to improve synchromesh action. Perhaps engine warms the clutch fluid, which expands and releases clutch fully when warm. Check clutch biting point when cold - if very high up, or if very slight clutch pedal movement can disengage clutch when driving along, consider clutch not releasing properly (friction plate or thrust bearing - high mileage wear; replace clutch if so).
Clutch fluid may be contaminated with air, reducing effective clutch travel - bleed with new fluid.
If clutch is failing to disengage properly when cold, clutch biting point would be right near the floor, not high up (DOH !).
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ive already done an oil change andthe lad at the garage actually went on the computer 2 check which oil grade 2 use so any more ideas would be of great help
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