Try the other buttons. One of them should put you into recovery and one of them will put you into fastboot/bootloader mode.
Yup that did it. Holding home and power brought up clockwork. Strangely the function of my buttons was reversed, so menu was the down key and home the enter key - something for other 7005 users to bear in mind perhaps. I opened the gapps zip and it all installed perfectly.
Thanks so much to all you pros who helped us newbs work through our problems. It has made a huge difference to my tablet.
Big thanks
Richard