VIRGIN TRAINS BIRMINGHAM TO LONDON RETURN ADULT TICKET ?

I HAVE 1 ADULT RETURN TICKET FROM BIRMINGHAM NEW STREET TO LONDON EUSTON VALID FROM 14/02/2012 UNTIL 18/12/2012 RETURN FROM LONDON EUSTON TO BIRMINGHAM VALID 14/12/2012 UNTIL 13/03/2012 £50 FOR BOTH TICKETS OR £20 SEPARATE - I PAID £158 ***** CASH ON COLLECTION ONLY *******