Education plays an important role in determining salary in the UK. As reported in 2018, individuals with a bachelor's degree earned almost 130% more than those having no qualifications, according to Annual Population Survey data. However, having a postgraduate degree, your compensation may rise even further. The report also mentions the following:
On average, people with A*-C GCSEs or equivalent earned GBP 381 a week
Individuals having no qualifications earned an average of GBP 304 a week.
On average, A-Level or equivalent individuals earned GBP 435 a week.
On average, people having a degree or equivalent qualification earned GBP 694 a week.