Ok, this is the best I can do - from an Australian with an English father, and a penchant for British comedy.

On Wednesday 22nd...
...this (coming) Friday is the 24th
...next Friday is the 31st
...last Friday was the 17th
...Friday last would also be the 17th

On Sunday 26th...
...this (coming) Friday is the 31st
...next Friday would be confusing, but I think most people would assume the 7th and plead the 5th
...(last) Friday was the 24th
...Friday last (eg I saw you on Friday; I mean Friday last) would be the 17th.

I think.