No brakes after fitting new pads?

[tight fart]

I've fitted new pads all round and the pedal now goes to the floor, I can pump the pedal up but if I leave pressure on it, it sinks.
I expected to find a piston seal gone and a puddle of fluid.
On an older system I'd have said the master cylinder seals had gone.
Could it bu99er the abs pump by fitting new pads?
I've driven it up and down the yard and the brakes feel better in reverse.

(It's an Iveco daily van)

[tight fart]

Not yet, one I was on my own and didn't have a pedal pusher,
but also I couldn't see how I'd introduced air into the system.

Also with air you tend to be able to pump up the pressure and it holds, this is.

[tight fart]

Thanks, good call on clamping them off, I'll try that, when it stops snowing here!

[tight fart]

Drove the van yesterday having blead the brakes and they are a lot better but,
White smoke filled the road for about a mile on my test drive.
My question
Could the servo have sucked oil into the manifold?