Thanks all, sounds like I can probably expect the stock tyres to last me 3 years and roughly 15k miles. Will save myself £400 and go for the nissan care package for £600 instead of the lease option of £1000 including tyres.

Just confirmed a lease deal. Service pack offered for 1k includes tyres but Nissan's own pack is 600 and does not include tyres. Wondering if anyone can advise how long tyres might last? 3yr 6k miles/year is the lease.
Thanks.