Okay, I will concede a certain amount of frustration with getting the microfilm apparatus working, and also, the thing I wanted to look at was at the far end of the reel, and this damned automatic system, unlike the good old hand-operated ones, means one is unable to fast-forward and rapid rewind but has to sit there while it takes its leisurely time.
However, I did find the article I was looking for and was able to email a pdf to myself, so that was a win.
I then went and had a somewhat mid sushi lunch at St Pancras, followed by a coffee from the hip organic coffee place in the corner of the entrance to BL courtyard - coffee okay, service not all that, sat and drank in sunny courtyard.
Then went and picked up my books in Rare Books and Music, this was because one was Notorious Banned Book which had to be consulted at desk adjacent to Reference Desk (as most copies were destroyed and this was presumably official deposit copy of record, fair). Actually I find that the copy I have (Paris edition) is the one with preface by noted litterateur of the day.
Also looked at two works on Banned Books which referenced it, one of which was not all that (confused Joe Lyons teashops with Lyons, France) and another which I need to return to if project is a goer. Might even see if the p/back or electronic versions are available at eligible price.
Then very agreeable busride home.