There are many reasons:
Early abolition of serfdom
Serfdom is the status of peasants under feudalism, specifically relating to manorialism. It was a condition of bondage which developed primarily during the High Middle Ages in Europe and lasted in some countries until the mid-19th century
Scotland: neyfs (serfs) disappeared by late 14th century, but heritable jurisdictions survived until 1747.
England & Wales: obsolete by 15th-16th century
Abolishing serfdom is important for creating a middle class.
An very early and well developed legal system protecting personal and property rights
First European Nation State
Henry VII wins the War of the Roses in England, begins the Tudor dynasty in 1485.
The UK did not invent many of these things, but its strong legal system allowed them to flourish, such as contracts, equity, mortgages, joint stock and limited liability. Private companies were able to use joint stock with the permission of the monarchy to finance trade and settlements in British colonies. An example is the British East India Company.
Great Britain's successful global trade empire
It could draw in raw materials it required or use as markets to sell its goods
process which ends traditional rights such as mowing meadows for hay, or grazing livestock on common land formerly held in the open field system. Once enclosed, these uses of the land become restricted to the owner, and it ceases to be land for commons. In England and Wales the term is also used for the process that ended the ancient system of arable farming in open fields. Under enclosure, such land is fenced (enclosed) and deeded or entitled to one or more owners. The process of enclosure began to be a widespread feature of the English agricultural landscape during the 16th century. By the 19th century, unenclosed commons had become largely restricted to rough pasture in mountainous areas and to relatively small parts of the lowlands.
Enclosure is one of the causes of the British Agricultural Revolution, but it causes mass unemployment. The unemployed people often sought work for low wages in the Industrializing Northern England.
British Agricultural Revolution
unprecedented increase in agricultural production in England due to increases in labor and land productivity that took place between 1750 and 1850
Fewer people were needed as farmers, so this also caused people to move to cities and seek paid employment.
Large coal and iron ore deposits
This is an important natural resource for industry to create steel and steam powered machines.