I'm pretty sure 'Chancery Lane' is an illegal move under 'Rushton's Second Adjustment Rules (version 3)'.

I think your getting confused with the rules of 'Rushton's Second Adjustment Rules (version 2)' where 'Chancery Lane' is and has always been allowed. However I concede I may be wrong...

"We need a ruling Humph!"

By the way, it's come to my attention that some people are still unaware of the technical difference between an 'optician' and an 'optometrist'.

Well, an optician is someone who's qualified to examine the eyes and prescribe spectacle lenses, while an optometrist is someone who always looks on the bright side.