With the upcoming changes with FC points is it worthwhile taking the 18.5 K additional points with the MBNA Black card ?
As is usually the answer these days, it depends.
You'll be paying the £140 fee so you'd be "buying" the 18,500 miles at about 0.76p/mile - as to whether that's worth while, it'll depend on whether you can get more value than 0.76p/mile when you redeem them?