I did a bit more googling and found some advice about whether or not to disclose so am happy with saying No. Also I haven't any gaps in my employment as I was fortunate not to be off work for very long (working part time helped). Good luck with the job search.
I'm so pleased I've read your post JenJen. I've just applied for a new job (mine is being made redundant at the end of August) and clicked 'No' for disability. One year on from surgery and RT, NED in March and taking Anastrozole for 5yrs I never even considered that I might be 'disabled'! I've just googled the equality act so If I'm fortunate enough to get an interview I'll have to 'come clean'.