Mr Tipple (Letters, March 10) is right in his general comments about English speakers' general inability to speak correctly, but wrong in his specific example.

"One of the things that is" is in fact correct the subject of the sentence being 'one' and not 'things'. Thus his elucidation should read "One (train) that is in the habit...."

This was well illustrated by a DES advertisement proclaiming that 'One in five British employees have poor literacy and numeracy skills'. Oh, dear still, at least the mistake was corrected in a later advertisement.

David Kavanagh

Alnwick

Swindon

PS My light still hasn't been repaired