Papafaith,
Time does indeed fly - it only feels as if you arrived in the UK last week and you are now due for renewal
Well, you should apply any time within 2 months of your initial Visa expiry date - as per current rules
Your list includes manyunnecessary documents - keep it simple Bro.
The folowing items as per your list would be appropriate: 1, 2 (dont you have a switch or credit card?), 3, 4, 5, 6 and 15.
No harm in including the other documents but they are not really necessary - approval will be straight forward
Good Luck - Naija Bro.
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Where there is a will there is a way.