I'm moving house and my daughters nursery and am having to work around their availability. I currently work 21 hours in an office over 4 days and have emailed my manager (who was not in office) whether I could work slightly different hours over 5 days. His response 'I will have a think'. Is he able to say no? I thought if I had a child under 5, employers had to allow parents to work different hours as long as the work and running of the office were not affected?