William Hannington Kasozi, 81, has fond memories of the last time Queen Elizabeth visited Uganda.

The Queen was last in Uganda before independence in 1954

Working as a clerk in the national electricity company at the time, he got to meet the Queen in person.
"A few of us were selected," he tells me in his small brick house on the outskirts of the capital, Kampala.
"We got to shake her hand, she asked how we were, and we told her she was very welcome in Uganda."
Mr Kasozi thinks it is a miracle that he has lived to see the Queen's return, before she opens the Commonwealth Heads of Government Meeting (Chogm) on the 24 November.
He is unlikely to get to meet her in person this time.
But many people are just as excited about her visit.

It is the first time she has returned to the country since a trip in 1954 when she inaugurated the Owen Falls Dam, Uganda's first hydro-electric power station.
Much has changed since then.
The country gained independence from Britain eight years later and the Owen Falls Dam became known as Nalubaale.

What is the necessity of writing that he met the Queen in person?
You could simply write he met queen last time when she visited Uganda.
You could go to Rome and meet his holiness the Pope or you could go to India and meet his holiness Dalai Lama. You will not write I met him in person, will you?
In the case of holinessess it should be to have the audience . I don'think you will write I met his holiness.

I have learnt the existence of meet ing someone in flesh too.
If you want to emphasise that it is that person you met face to face, yes, you would use "in person".

You might have an audience with the Pope or the Dalai Lama, or indeed the Queen, but you can also meet them in person in other circumstances.
"In the flesh" has a rather literary tone to it. I would say "I met him in person" or "I met him face to face."
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Thanks Feebs11.

Do you even say that met someone in the flesh?
It may be old English? I am not sure.
 BarbaraPA's reply was promoted to an answer.
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We sometimes say that we have met someone via the internet, or over the telephone. Such methods would not be considerd 'in person'.

I think the phrase is used here to emphasise the 'honour' of the situation.