It seems that what I had written before that got lost, so please insert the following before 'Ach!':
Thank you, Derek, for the picture - my heart is glad! It seems to me that though the crux configuration is the same we are looking definitely at two knots here - Ashley's loop and Tom's Bend? The necessity of cutting and placement on the bight make them as different as the bowline and the sheet bend (two of your Surrey Six, I think, so they must be distinct in the eyes of the Guild, despite identical configuration).
And thank you Dan, as ever, for your sympathetic precision ('nice' is what Shakespeare would have called it, but the word has veered away in meaning). I am going to need a bit of help getting back onto your shoulders. My dear Lady hopes to get to the flat later in the week but ABOK is too hefty a tome for such a slender one as she to lug across town, and she is, for some reason, unwilling to get on the bike (ever again).
And thank you Znex for your attention - this glorious Guild really does seem to care!