the -er shortening ending is one of several in UK english. (see: https://en.wikipedia.org/wiki/Oxford_%22-er%22 https://en.wikipedia.org/wiki/Oxford_%22-er%22)

the -er shortening ending is one of several in UK english. (see: https://en.wikipedia.org/wiki/Oxford_%22-er%22 https://en.wikipedia.org/wiki/Oxford_%22-er%22) "tradie" is the variant i encounter more often, though.