On account of UK weather means likely crop failure, and plants don't grow overnight so would be next year before anything grown could be harvested.
As "raw" tobacco is actually quite cheap to buy, as it isn't subject to "health " taxation and any ordered would be sat steeping inside a week.
Reading through various pages online, coffee filter papers, aquarium filtering and stainless mesh have been suggested as methods to filter out the solids, but I reckon that part of the reason for these methods being so slow is the solids clog the filter, whereas a deal of care when decanting would leave most of the unwanted solids behind.