Many years ago when The Three Horseshoes in Ingleton was a Yates's pub I remember the then landlord showing me why I should not bother trying their 'keg' bitter. From the same barrel came a pipe with a splitter. One branch went to the hand pulled draught pump and the other went, via a small chiller, to the electric 'keg' pump. They sold the keg for 2p a pint more :-)