[quote=Deejay]Correction: I think that we all agree that older tyres can become a danger, however it must be pointed out that except for certain commercial and industrial vehicles, there is no mandatory tyre age limit for cars in the UK at present. Plenty of recommendations from motoring authorities but no actual mandate; only tread depth, cracking and improper inflation would cause an MOT failure.
Thank you. Quite right, Deejay. My apologies. The only tyre age the UK government mentions, (Feb 2021) are for "HGVs", which includes buses and coaches above a gross vehicle weight of 3500 kgs) and all axles on minibuses when fitted "in single configuration". 10 years. It is grossly inadequate but then all governments are swayed by forces other than safety, regardless of what the manufacturers, experience or science dictates.
https://wfirm.com/tires-expire-in-six-years/In any event, forgetting local laws and safety, Morgans with quality, youthful rubber are infinitely more fun to drive. Why own a Morgan if it gives less joy than it can? I have driven many Morgan, all types and years, with great, mediocre or bad rubber. No contest which is the best. Sadly, tyre age deterioration is such an incremental thing (much like unattended suspension/steering maintenance), that their owners don't realize it has diminished their joy. They only recognize all that when they put on a new set of WISELY-chosen tyres. Worth every penny. Luckily for the UK, the choice and price of tyres is the best I have seen in my travels. I have made many cranky with this mania, but only until they try the best tyres for their Morgan..then they become disciples. I have seen too many moggers lose their front or rear end (those on the car ;)) on a great mogging road and then blame themselves when it is merely their tyres. We unknowingly adjust our driving fun to the inadequacies of any vehicle we drive.
As noted, I have never reached even the manufacturers' recommended swap age let alone their limit regardless of mileage (10 years). Tyres of any type begin to be less than their maximum effectiveness and comfort long before they reach any limit. I swap the out.
I used to give the replaced ones to my daughter's boyfriends..the ones I did not like. 
I lent my daughter one of our other vehicles.
gmg
