The Saddle Tank was at best less than average in the interest stakes,finding myself in a Marstons pub I had the other choice of Pedigree(which I have never liked) or the two Hobgoblins (normal and Gold), What did surprise me was I was charged £3.75 for the pint and a packet of crisps,It turns out all cask was £2.75 on Mondays ,albeit only Marstons beers available.Don't know the dark Purity beer, unless its the keg only 5.8% Saddle Black.