My GT premium quotes online and then by phone went up dramatically this year apart from Locktons for some unknown reason. Nothing on my side had changed. i asked obviously but got some general rubbish about inflation etc. I have a second car at the same time which hardly changed so I can only conclude there has been some significant claims on the cars in the last 12 months.
Bit late in this discussion but for what it is worth,
I have used Churchills – insuring as my second car with limited mileage (5k) over the last 3 years.
They allowed for NCD from m y primary car but there was a significant increases in premium this year.
Same with the Trident badge on the side at the back up high- I have finally got one but it was on back order for 5 months . I think it was because it was black instead of normal silver colour. Also lambda sondes are on back order !