I believe Long Melford is larger than some cathedrals around the country.
John Clopton, an incredibly wealthy Wool merchant in the area, spent what even then, was an absolute fortune in constructing what is still the largest parish church in the whole of the UK.
Here in Wales, St Davids in Pembroke, Bangor and St Asaph in the North, are all significant cathedrals in their own right, but in over all size and dimensions, are simply overshadowed by the incredible size and dimensions of Long Melford.