My letter of employment - UK Spouse Visa

[philemon_bodiba]

Hi

I will be send out my letter of employment to my wife in South Africa in the next few weeks to support her application and that of one child dependent. I'm fully aware in that in this case the minimum financial threshold required is £22 400.
Here are the contents of my employment letter:

The above employee (me) has been with the company since 11 May 2008
He is employed as a full-time Warehouse Operative. He is paid on a four-weekly basis approximately £1, 350 per pay period. This level of pay has been in effect since July 2013 with a pay award pending. His approximate gross annual income is £23, 617, which includes premiums for night and weekend working.

There is also occasional overtime offered, but this is not guaranteed.

The position is of a permanent nature.

Should you need any further information please contact Mrs xxxxxxx on this e-mail xxxxxxxxxxxxxx.co.uk.

Yours Faithfully'
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Now here is my question: Has the letter been brilliantly written and will my gross income taken into more account rather than my four-weekly wage?

Looking forward to hearing from you, guys.

Thanks....