Possible Clues:

• One of those going around Downton Abbey is useful for extras travelling with an entourage?
• Property conveyance?
• Use it to pick up speed turning round, say
• London station wagon
• Station wagon, to Brits
• Transport that's inherited?
• Spacious vehicle
• Vehicle with five doors
• Vehicle's position in uphill race?
• It's driven Teresa and cat mad!