They will be forced to remove them the same way Plymouth drivers where forced to remove Bristol to Taunton (even though many protested and wanted to keep it on cards knowing it would frequently be needed for diversionary purposes). But the policy these days is , once the depot loses a route or traction, then it is removed from the card, and probably rightly so in all honesty. And dare I say it, but when has being "detrimental" to the company been a problem before. Plymouth losing Taunton to Bristol proved extremely detrimental, but it was still ploughed through.