The boss of GlaxoSmithKline has been crowned the most highly rated chief executive in the UK by his employees.

According to research from jobs site Glassdoor, which questioned employees anonymously and voluntarily, Sir Andrew Witty beat off stiff competition from the chiefs of John Lewis and Rolls Royce, among others, to win the title.

Witty, who became chief executive of GSK in 2008, was given a staggering 100% approval rating by his staff.

An employee praised the pharmaceutical giant for its strong work culture "based on transparency and ethical behaviour" and another staff member claimed the employer was full of "great people willing to help".

John Rishton, chief executive of Rolls Royce, and John Lewis' Sir Charlie Mayfield were joint second in the table as both bosses scored a 97% approval rating from their workers.

The news comes after tens of thousands of staff at the John Lewis Partnership were awarded eight weeks' worth of pay thanks to a £202.5m bonus pot.

The firm, which operates John Lewis department stores and Waitrose supermarkets, said the bonuses would represent 15% of a worker's salary – down from 17% last year.

A whopping 91,000 workers, known as "partners" at John Lewis, were given the pay-outs.