How much notice for the assement do they give?

just thought I would update in case anyone else was in a similar setup.

I phoned ATOS on their 0800 number and spoke to a lady. she confirmed what you said, she said its usually 2 weeks notice for the assessment and I can change it only once for up to 2-3 ahead.

here's the page with the number if anyone else needs it:
www.atoshealthcare.com/claimants/types_of_assessment_esa_wca

WCA Customer Service:
Call: 0800 2888 777