Hiya RobZed,
I've just had my 4 year service done on my Zed,
I went to Nissan in Leamington and found them to be OK,
I'm nearer to Birmingham but all the Birmingham Nissan dealerships have rubbish Google reviews,
Leamington has atleast decent reviews,
I told them not to wash it which they didn't, they gave me a courtesy car for the day and 12 month's Nissan Breakdown cover.
I also clocked the mileage when I left it,
It had an extra 2 miles on the clock when I collected it, so really hadn't gone out of Leamington, so no long test drive and excuse to thrash it.
I'm not saying they are going to be any better than anyone else after using them only once but may be worth a look.