Best way to cover dark roots temporarily?

[PollyIndia]

Hi everyone
I am doing a photoshoot thing for work, and it's the week before I finally see the hairdresser for my colour for the first time since October. I'm blonde, but dark roots and the odd grey. Has anyone got any good hacks so my hair doesn't look too dreadful in the pics? It's long, so the style is ok, it's just the 2 inch dark roots!
Thank you!

Batiste do a dry shampoo blonde spray that can help to blend roots temporarily for me!

L'Oréal do temporary root spray. Never tried it but have heard ok things.

www.lookfantastic.com/l-oreal-paris-magic-retouch-temporary-instant-root-concealer-spray-75ml-various-shades/12590507.html

Thanks all! I actually have that batiste so I'll experiment with that first

I tried that loreal retouch stuff and threw it straight out. Made my hair look so greasy, it stank and felt horrid. The blonde Batiste spray is so much better.