Assessing the historical values of money can be extremely difficult, even over a fairly short period (such as a few decades), can be very difficult as there are several different ways of making comparisons. e.g. some historians choose to look at the buying power of money, whereas others prefer to relate money to wages. Others still might use official measures of inflation, although that's not easy when the period under consideration pre-dates any official calculations of the inflation rate.
In the 15th century though an artisan (such as a carpenter) would earn around 6d per day, so £1 (= 240d) represents the earnings of such an artisan over 40 working days. The National Careers Service website suggests that an experienced joiner can earn £30,000 p.a. for perhaps 230 days work, so that's about £130 per day. So a modern-day carpenter would earn about £5200 in the same time that a 15th century one could earn £1.
However that's just one way of doing the calculation (and based upon just one particular occupation). Other methods of calculation can produce
vastly different results, as follows:
A simple 'purchasing power' calculation produces a current value of £709. (That looks at what you'd have to pay now to buy the same amount of commodities, such as bread, etc).
A 'labour value' calculation (similar to mine above but based upon a wider range of occupations) shows that you'd need to pay someone £6451 these days for the same amount of work that you would have had to pay £1 for in 1413.
An 'income value' calculation (based upon the proportion of an average income used to buy a commodity) produces a figure of £26,290.
An 'economic power' calculation, which examines the value of a sum relative to the country's GDP, gives a figure of £458,800.
https://www.measuringworth.com/ukcompare/