Charles, thanks for your very helpfull advice. The manure in the beds are there 3 seasons. I think what I will do is fill 1 raised bed with the shavings manure and try that with a mix of veg and compare them with the other 2 (straw manure) beds. On the 2 plots I will do as you suggest and use the manure as a mulch and mix it in with the soil in part of 1 of the plots. All I can say now is “watch this space”.
I only came across your ‘no dig growing’ in last Sunday’s, Sunday Times, which I found fascinating. Also, congrats on your website, which is very informative and easy to navigate. I look forward to learning more.