I'll take that.
The first tag was the now doomed Cundy Street flats, built 1952, near Orange Square, Pimlico Road.
The Queen Consort was living here in the early 70s, (in Stack House, the one pictured) when she was introduced to King Charles III who was then aged 21. He was a regular visitor.
The second tag was an urn in Queens Sq, Bloomsbury. The two inscriptions were commissioned to celebrate the Queen's silver jubilee in 1977, one by Philip Larkin and the other by Ted Hughes.
It was Larkin's one that Starmer quoted in his commemorative speech on Friday:
In times when nothing stood
But worsened or grew strange
There was one constant good
She did not change
The other, by Hughes is more appropriate for cycle fans perhaps?
A nation's a soul
A soul is a wheel
With a crown for a hub
To keep it whole
When Larkin submitted his, he sarcastically imagined what Hughes might offer and came up with this. Clearly not good friends then.
The sky split apart in malice
Stars rattled like pans on a shelf
Crow shat on Buckingham Palace
God pissed himself –