what are the names of the transmitters?
allenheads, alston, bellingham, blaydon burn, byrness, catton beacon, durham, esh, felling, fenham, haltwhistle, haydon bridge, hedleyhope, humshaugh, ireshopeburn, kielder, morpeth, newton, seaham, shotleyfield, staithes, sunderland, wall, weardale, whitaside
which of those has a pol. value of h?
wall