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What is the issue? Makes it easier for us to help if we have more info.
sounds more like a bad headlight switch... do the dash lights work? Center console lights on?
When I say switch I mean the actual headlight switch on the steering wheel... This is a known issue with rovers and may be your issue...
Normally when both tails light do not work the switch is the issue, but have you checked to make sure the bulbs are just not bad.