I purchased a 12 month old 1.8 icon tech in November 2021 from WH Moon, Wigan. My 3 year service plan covers two full and one interim service. I pay £33.12 per month for 30 months. I believe this was calculated at the cost of 2 full and 1 interim service less £100 and divided by 30. Puchasing a 3 year plan on a new car would be less as it would cover 2 interim and 1 full service.

i took out the 3 year service plan last March with a new Corolla.. it covers 2 interim & 1 full service and is £21.91 per month for 31 months with an initial single payment of £22.14. the payments are over 31 months finishing Oct 24 so well before the 3rd service is due. Probably gone up since March but it protects against inflation and I got a bit of dealer discount to sweeten it a bit…the benefit is you can get unused payments back if you sell the car and haven’t had the relevant service (minus admin fee), or you can transfer it to another car or transfer with the sale of the vehicle… of course I’ve no idea what the cost of servicing for the 3 year period would actually be as its crystal ball stuff, but given my general experience of previous non hybrid service costs it seemed worth doing as nothing, (apart from a new Tesla 😵‍💫) comes down in price…

The other prices are about the same as my plan.Inflation means it will go up in price,but if you take out a plan negotiate with your dealer,if you are a new customer just bought or thinking of buying a car the ball is is in your court.Good luck.