Any ideas?

Here are some examples I need to understand the role of Mr Wallington.

MR P WALLINGTON
(of Counsel)
Appearing under the
Employment Law Appeal
Advice Scheme

---------------------------------

For the Appellant MR WALLINGTON
(OF COUNSEL)
ELAAS


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APPEARANCES

For the Appellant MR P WALLINGTON

(OF COUNSEL)

MESSRS HOLLOWELL &

BOLLAM

EASTON CHAMBERS

39 EASTON SQUARE

PORTLAND

DORSET DT5 1EB

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For the Appellant MR P WALLINGTON
(of Counsel)
Solicitor to the Metropolitan Police Service
New Scotland Yard
Broadway
London SW1 OBG

Yes. It means REPRESENTED by council/lawyer/solicitor/attorney - take you pick for wherever you live. Mr. Wallington is the appellant, meaning he's the individual who filed the action.