Medieval Britain post

XVth century scribe at work (modern reconstruction)
Source: wikimedia commons

How letters were sent in 15th century on British Isles describe Deborah Thorpe in September 2013 BBC History Magazine. 

Not surprisingly the reason of sending letters in those times wasn't much different than today. People sending the letter in every topic starting from business related to love affairs. However, there were many challenges in process of getting a letter from sender to recipients. First one was to find the right person suitable to write the letter as not everyone was capable to do this. 

How wool influence British economy

Women sheering sheep for wool fleece.
Source: wikimedia commons

10 million wool fleeces yearly were exported from England in beginning of 14th century ... that's a lot - and make England the world biggest wool producer in those time. But is not only quantity but also quality:

English farmers had developed breeds of sheep that produced fleeces of varying weight and quality, some of which were among the best in Europe. Source: History's big numbers, interviews by Charlotte Hodgman, BBC History Magazine 2/2014

Increasing demands from continental trade center  - Ypres, Ghent, Bruges (all nowadays in Belgium) - requires also good organisation.  Key role plays here monasteries which not only kept theirs own herds but also contracted flocks from peasants leaving in surrounding villages. To make it happen new occupancy like woolman or woolmongers where created. Especially in this area specialized are Cisterian monasteries  - it was integral to the order economy - sheep not only provided wool, which could be used to make clothing and blankets for the community, or else sold, but were important for the manufacture of butter and cheese.