The suppliers advise the below on these...
'Typically, roof tiles are expected to last for around 60 years as the production process is very similar across manufacturers, and despite differences in the sand or coatings used, most tiles would have a comparable 60 year lifespan.
It’s important to note that a 60 year life expectancy is the expected service life of the product in normal conditions, when correctly installed. This is not a guarantee or warranty of its longevity.'