Earlier, Pete S wrote:

It is a U2 with wing tanks...

I disagree. I think that the others have nailed it; it's the GROB
Egret.

For comparison:

The Van Nuys photo:

http://www.abtriplec.com/images/misc...tery_plane.jpg

U-2 3-view:

http://www.aerospaceweb.org/aircraft...s_schem_01.jpg

Photo of GROB Egret:

http://www.spyflight.co.uk/G850.HTM

The reasons I'm pretty sure that it's not a U-2 or TR-1:

* Nose too short

* Aft fuselage too long

* Wing pods too short, too far inboard

* Wing planform has greater aspect ratio

* Absence of large air intakes