2. is the Armstrong-Whitworth Armadillo.
3. is the Austin Greyhound indeed
you also answered 5 correctly
assuming that nobody else is gonna answer the rest they are as follows...
1. is the Phonix D.I
4. is the Parnell Panther of the Royal Naval Air Service (those arent DTs, they are floats.)
6. is the most obscure plane i could find, in fact i could only find about 3 pictures of it, and they were all models. it is the Microplano Veloz of the Mexican Air Force.
PS
Furball, you post some aircraft for me to identify.