premmington
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- Norfolk
More likely a burst out through weakened, UV degraded tyre, a cut from a broken spring or similar would be radial, not across the tyre due to rotation...
You can also see cracks between the tread in other parts, indicative of a time-expired tyre. I think the maximum age for an MoT pass is ten years, less on a PSV.
There are currently no MOT rules surrounding tyre age for private passenger vehicles, but tyres over 10 years old at the time of the test will be failed if they are on any front steered axle, or any rear axle of a minibus with a single wheel fitment.
I see some god awfull aged tyres on private cars in my workshop. They will fail if they are perished or split.