Many thanks for this - I've wanted to hear it for some time.  I'm listening to it as I type this, and certainly the 8th March upload without the video has the better sound (and nice pictures too - Yorkshire, I think).

Great to have you back Colin, but you are by no means "a very junior member" - you return with all the expertise and musical knowledge that you always had, and your posts will help to revive a forum that had until recently been flagging somewhat.  By the way, what do you think of the "new look"?

Jeanie Deans (I can't remember if it was the whole opera or substantial excerpts from it) was broadcast by the BBC in the late 1960's.   I was a student at the time and listened to it on the radio.   I can't find the broadcast on the BBC Genome website, though.
Muschat's Cairn, featured in the opera, commemorates a women (Ailie Muschat) who was killed on that spot by her husband, a surgeon named Nichol Muschat, in the 1700's.  He was hanged in the Grassmarket, Edinburgh.
The original cairn was moved when the road was built through what is now the Queen's Park.    It is around 10 minutes' walk from my house.

Many thanks for this information, rkhenderson. 

The link to the Gavotte from the concert is:

https://www.youtube.com/watch?v=QFgLTzF7Vjc

The Mosolov Gavotte begins at 36:34 and runs for 3 minutes.  A YouTube search for Mosolov Gavotte finds two gavottes, one is for solo harp and the other is a movement from a harp concerto.  It's neither of these.  Searching for мосолов гавот finds a gavotte from "Dance Suite no 2", for oboe and piano.  It also finds the piece from the Orpheus Radio concert, posted separately on YouTube.  There is nothing to say where it comes from, though Wikipedia lists a Gavotte and Minuet (1935) for orchestra, as does Dundonnell on this forum.

Unfortunately the final fragment from the concert turned out to be the closing bars of The Queen Of Spades (Tchaikovsky).  So I'm afraid that we are no further forward with Mtsyri - perhaps what we have is all there is.

I've listened to the concert.  The excerpts from Mtsyri are interspersed with music from other Russian composers - Tchaikovsky (Francesca da Rimini and Queen of Spades), Mosolov (Gavotte) and Golovanov (Salome).  There are the three Mtsyri excerpts that we have already (these start at 9:18, 30:57 and 52:05) and a short piece at the end (1:01:35) which unfortunately lacks a subtitle.  Could it be the final fragment from Mtsyri?  I don't understand spoken Russian so I don't know whether the narrator gave any clues as to its identity.  I shall add this fragment to the other three and see if it makes sense.

I'll have a go at it - I have three of the fragments already, presumably.

The symphonic poem is good late-romantic music.   The YouTube clip is apparently a fragment of the piece ("Fragment 1").   A YouTube search brings up two further short fragments (2 and 3).  All were uploaded to YouTube over a period of a few weeks last year.  I have joined the three fragments using Audacity and have uploaded the result (below).   They fit together well, but we are still left expecting more at the end of fragment 3 - a quiet coda or epilogue perhaps?   Searching for a Fragment 4 brings no results, though there may perhaps be further uploads in the future.
I think the correct transliteration of the Cyrillic is Mtsyri, not Mytsri.  Google tells me that it is a poem by Mikhail Lermontov written in 1839.

https://www.mediafire.com/folder/55ln5ffrg1chu/Catoire_-_Symphonic_Poem_Mtsyri

Thanks Albion for this.   It will be interesting to see what follows from it.

I would love to see Iain Hamilton's symphonies recorded - particularly the 4th, which has become one of my favourite modern symphonies after discovering it here in our Archive.  Hamilton's centenary is next year, June 2022.   Also I would like to hear the remaining unrecorded symphonies of Arthur Butterworth, whose centenary is August 2023.
I wonder if someone could have a go at reconstructing York Bowen's third symphony?  Since it was performed on several occasions and broadcast at least twice, would there not be parts lying around somewhere?  Failing that, could it be reconstructed from one of the extant recordings?   After all, wasn't André Mathieu's 4th Piano Concerto reconstructed from a performance on a set of 78's?
It's great to see this forum gradually coming back to life again!

Many thanks for your explanation, Mr Godfrey.

Yes, I particularly wanted to hear the violin concerto as I already have a commercial recording of Sym 2.  I am assuming the concert was changed due to coronavirus, but a few words of explanation from the announcer would have been appreciated.  Also some indication as to when (or whether) we might hear the violin concerto again.

I don't know why we can't play the symphony from the "music played" list on the website - the play button is greyed out.   But you can still hear the whole concert by clicking on "listen now".  The Grace Williams symphony begins at 1h 49m.  Alternatively I think you should be able to get straight to the concert on:

https://www.bbc.co.uk/sounds/play/m000gm67

This may not apply if you are outwith the UK.

Here is the information you are looking for - from the LMIC website:

"(1911)  Concerto for Violin and Symphony Orchestra
     violin
     symphony orchestra
Symphonic music
The first Violin Concerto in Latvian music.
I Allegro moderato; II Poco meno, a tempo; III Molto largo; IV Allegro moderato.
Score, parts and piano reduction at the Music Department of the National Library of Latvia.
Second redaction for Cello and Symphony orchestra (1923)."

https://www.lmic.lv/en/composers/jazeps-medins-2426#!/