Your letter has most of the information, but needs to be more detailed and a bit more formal.
What is the injuries benefit he receives, and why is it being mentioned in the letter?
- Does it make him exempt from meeting the £18,600 financial requirement?
- Does he need it to meet the £18,600 requirement?
If neither of those apply, then it is irrelevant to the application should not be mentioned in the letter (otherwise it will complicate and confuse things), and you should not be including any bank statements that do not show the deposit of his employment salary... so there is no reason to provide a second bank account.
So, a few tweaks to the letter:
To the Entry Clearance Officer.
I am writing this letter in support of my wife, Lori Anne Burns Benson's application for a settlement visa to join me in the UK. I am a British citizen and have lived in the UK since birth.
I have been employed as a Service Supervisor of Barrowford Safe & Lock in Barrowford, since [DAY] July 2013, on a [full-time, permanent contract] and my base salary before tax is £X,XXX per [YEAR - this number must be over £18,600]. Therefore I am meeting the financial requirement under Category A and am including all of the required documents to show this. Please note that my main bank account statements still had my ex-wife’s name on, up to October 2018, this was due to the fact that the bank would not remove her name without the both of us visiting the bank together, which we have since done.
Once Lori's visa has been granted, will be living together at [FULL ADDRESS], which I have been renting since [X date]. It is a 3-bedroom property with one reception room, and my son and nephew also live in the home with me. I am including a letter from my landlord giving Lori permission to move in when she arrives in the UK.
Lori and I met via my poetry man page on face book on the 21st of January [YEAR?]. and we entered into a relationship on [DATE]. We met in person on [DATE] when [give details of visit] and while apart, we communicate daily via Facebook messenger and WhatsApp. We got engaged on 15th June [YEAR] when I visited Lori in Amarillo, Texas for 8 days. I then returned to Amarillo for 10 days in October [YEAR] and we married there on 28th October [YEAR]. We have decided to settle in the UK rather than the USA as I have a 10-year-old daughter who lives in the UK. [What about his son and nephew who live with him? He wants to stay so he's near a daughter he doesn't live with but not the son he does live with?].
Yours Faithfully,
His Name