I've been informally offered a new job and they are asking about my absence record. It says in the paperwork that a formal offer of employment will be subject to a satisfactory absence record. I've been off sick for 4 and a half months total since February and I'm worried that this will be "unsatisfactory". I'm on the brink of getting diagnosed however as of now I'm still currently undiagnosed. Can they take away the job offer? I'm in the UK.