I am uploading this thread because today I ordered some new tyres for my FL2 while searching for the same tyres I have on now, I came across the link below which decodes the age of your tyres.
The Dot code will be on the side wall either on the outside of the tyre or on the inside four digits example 0518.
Hope this helps, according to the decoder tyres are supposed to be changed after 6 years regardless of how many miles they have done.
After 10 years they are extremely hazardous.
http://www.tyred.org.uk/decoder