A delightfully mixed bag.
On the one hand, "The Secret of the Loch" is a very cheaply made programmer with some unintentionally memorable special effects. On the other hand, "The Loves of Joanna Godden" is a well-made period drama with an interesting script and some nice photography.
"Birds of Prey" was filmed in 1930, and has some of the faults typically associated with films made in that year, particularly those that were based on plays. Still, it is interesting from a historical standpoint. "Davy", a 1950s film made in colour, suffers from a script that is under-written, but Harry Secombe (playing a music hall entertainer) does his best with the weak material.
So, while this isn't the strongest of the "Ealing Studios Rarities" DVDs, it is nevertheless still of interest.