Yeah I like this idea but instead of just shipping Welsh Miners have it allow the training of Welsh Miners (costing 250 food) in the TC (with a build limit of 5) and allow welsh Miners to slowly train Coal Prospector Wagons (build limit 2). Coal Prospector Wagons will cost 400 food and 100 wood to train and have a gather rate of twice that of a normal mine. Along with the Welsh Miners having a double fast gather rate of coin, 5 Welsh Miners on 1 coal mine should have the same gather rate as 20 settlers on a normal mine. This would really help the British economy as I always seem to be running low on coin when I play Brits.
P.s if this was introduced Brits max settler pop would have to be reduced to 90 (from 99)