I've lead a sheltered life!
I can see prices through third party sites but always like to compare with BD! Interestingly enough a few months ago I booked through one of those sites, it was BHD to LHR, badged as LH, non earning, £50 cheaper than BD and the miles came through!
I may use miles to travel to GYD as BD are very expensive on the route. The other regular options that suit involved 2 stops and so a much longer journey.