I'm currently about to begin negotiations for a job I've been offered and the pay scale on the job advert ranges from £10k less than my current salary to £20k more.
I've moved between companies in the past and was being underpaid in one role (the new company said so) and got a £6k pay rise. I'm just curious to know what the biggest you've got is? I know all companies/circumstances are different but I'm interested in your experiences.