I have no normal ignition switch..

Im using a flick up switch and button to start

I also have a three postion switch where you can take the key out in two postion ie.. switch postion to run and remove the key
switch too not run and remove the key

i know i need an anti-theft device as well as a nomal ignition switch

I dont suppose they will allow the flick up and push button as a Normal ignition switch..Or do they

If not can i fit a basic fia type switch (just the one connector type)
to the main flick up switch feed, therefore not allowing power to the flick up switch.??

hope that makes sense

I used a battery isolater from Merlin Motorsport.

Its a battery terminal with a green twisty wheel - you put it on the negative terminal - that should count as at least one form of immobilisation.

They're about £7 + postage - have you got a steering lock ? That should count as the second...?

I take it you won't be keeping the steering lock, as that is an anti-theft device. I passed the SVA with just a normal ignition key and a steering lock.