Are tyre plugs legal in the UK?
Legality of tyre plugs
As per British Standard BS AU 159, a plug that is only applied from the outside of the tyre without removing the tyre from the rim is not considered a permanent legal repair.
What is acceptable
The only legal repair considered proper is a professional internal plug-and-patch repair. This means the tyre has to be removed from the rim so that the professional can look for other damage that may not be visible and then place a plug and a patch.
While external plugs can be used to temporarily repair a tyre to allow travel to a garage, an internal repair must be done as soon as possible.