Thanks for this, Denzelmum.  Will give these a go for sure and it is good to have your recommendation.  I wonder if you have tried the Oatey burgers?  (BTW I tried the zucchini moussaka from this book, I don't know if I did something wrong.  I found it quite time consuming to make and very sloppy--wouldn't bother again.)
Cheers, Lesley