Store › Twin Rate Twin Rate £240.00 Pay for both twins for the entire 5 series at once. I offer a 15% discount for the second twin. Frequency: One time purchase £240.00 Subscribe Save 5% Sale Price: £228.00 Original Price: £240.00 Every 6 weeks Add To Cart Added! Pay for both twins for the entire 5 series at once. I offer a 15% discount for the second twin.