Yes, but also no.
At a London children’s hospital, window cleaners dress like this. They are awesome. twitter.com/PhoebeWedding/…— PhoebeMiller Wedding (@PhoebeWedding) July 19, 2012
Those Spider-Men are actually cleaning the windows of the Sheraton hotel in Shanghai. The vagueness of “a London children’s hospital” in the description is a bit of a giveaway - as is the fact that, as far as we can tell, none of the children’s hospitals in London (Great Ormond Street, Evelina Children’s Hospital, Barts and The London Children’s Hospital, The Portland Hospital) have windows that look like that…
But one of those hospitals has indeed employed superhero-costumed window cleaners (including one Spider-Man) - the Evelina Children’s Hospital, as can be seen in this article.