Tried to edit post but forum gives database error. What I would add is the procedure for holding a car while it is being inspected needs to be reviewed to stop this from happening again.
5 minute penalty for engine change is for changing the engine after shakedown and before the rally starts. You can't change the engine after TC0. I don't think that 5 minutes is too much for...
The cars have to comply with the "NGTC" rules that the BTCC organisers wrote in 2011. Unfortunately they are on a password protected site. There's a general summary here...
Staying on offtopic, 5min penalty in Finland or just in Kenya are whole differen
WRC Secto Rally Finland 2025