Pimlico Plumbers like to be incredibly political and controversial.
The managing director is a guy called Charlie Mullins.
A quick peek at this wiki page and it says this:
Mullins was apprenticed to a local plumber at age 15, and started his own business in 1979, operating from a basement in Pimlico.
He is known for his collection of plumbing-themed number plates, used on the company's vehicles, and perhaps worth £1.5 million.
As of September 2018, Mullins has an estimated net worth of £70 million
Pimlico Plumbers donated £22,735 to the Conservative Party in 2015, and Mullins donated more than £48,000, in the two years to July 2017. He was a business adviser to David Cameron and George Osborne, and has been a vocal critic of Brexit.
In January 2018, Mullins announced that he would no longer be a Conservative Party donor, and declared his candidacy as an independent at the 2021 London mayoral election (which had been scheduled for 2020, before being postponed). In March 2018, Mullins said he would financially support the Liberal Democrats to support their campaign to prevent Brexit
And on the Pimlico Plumbers wiki:
It is known for its effective publicity, handled by Recognition PR and PHA. It was previously handled by Max Clifford. The company owns more than 100 plumbing-related number plates, fitted to its fleet of vehicles, such as LO 02 OLD (Loo too old), BOG1, DRA1N, W4TER and others. It gained considerable publicity through its employment of Buster Martin, who claimed to be Britain's oldest worker, cleaning vans part-time until his death in 2011. The firm's boss presented BBC Three show Britain's Best Young Plumber and has appeared on Secret Millionaire.
On 10 February 2017, in the Court of Appeal a plumber was found to have "worker" status for the purposes of various employment protection rights notwithstanding that he had been engaged as a self-employed individual. Pimlico Plumbers argued the plumber was an independent contractor but the Court of Appeal determined he was a worker with some employment rights. The Supreme Court of the United Kingdom subsequently granted Pimlico permission to appeal which, following a hearing on 20 and 21 February 2018, was unanimously dismissed.
In 2018, the company was criticised for erecting a large "Bollocks to Brexit" sign on top of their premises in Waterloo. Mullins defended the use of the sign, referring to the Sex Pistols' 1977 album Never Mind the Bollocks, Here's the Sex Pistols as precedent for being able to legally display the word in public
So with this in mind, do you think the intent of this policy is anything to do with covid? Do you think the company is particularly interested in workers rights?
Or do you think this is a PR machine looking for advertising and marketing opportunities for the business and feeding the personal ego and political views of its managing director?
With this in mind, I'd like to congratulate the OP in helping with that by splattering the company name all over MN.