Remember when we were on our way to Spain and I said what we thought were police trying to pull us off the motorway at Madrid and we didn’t stop or follow them off the motorway. What a relief we didn’t as they were bandits posing as police. We have just heard that 9 people have been arrested in Madrid for pulling cars/lorries and robbing the occupants. So best advice is if the car does not show a police sign or blue light (green in spain) don’t follow them!
J L D EQUINE 
Wow! You were very lucky.
We were stopped for speeding (apparently) in Bulgaria by police. They took our passports and only gave them back if we paid them €100 which went into their back pockets.
The 9 people arrested were wearing police (guardia seville) uniforms.