Lectionary 177 appears to still be at the British Library, Add MS 11841...

http://www.bl.uk/manuscripts/FullDisplay.aspx?index=0&ref=Add_MS_11841

...but the VMR Liste does not list any institution or shelf number. 

 

Thank you for pointing this out! I don't know how it became unlinked (we even have microfilm of it), but it is now linked again to the BL.