Conspiracy theory, They kept Cardiff on the calendar because its good to attract sponsors, once the sponsors signed on the dotted line they switch Cardiff for Belle Vue.
I understand the SON lost a lot of money, ok a GP will be more popular but I think in order for Discovery to make some money they needed to do 2 crowd pullers, it was always the plan in my opinion. I will put money on it being 2gps at belle vue in 2026 as well.