Thank you, I have made a note of your very good advice. I had a couple of very small moths tonight (Uk time) I have given them to Tich even though were still slightly large for him, fluttering insects usually do it for these frogs.
I have just looked and cant see them in the tank so hopefully he just had his first moths, (we always let them hunt moths as they so love to do so and I dont think left overs would hurt - although left over moths? I dont it likely!! Thanks again for your help regards Jay