Hi, thank you for your question. Given the long separation you can rely on the fact of 5 year separation and you do not require your spouses consent for this - you just need to demonstrate that she is aware of the proceedings.
Given the relatively straightforward nature due to the long separation, you can pursue this yourself and the court fee is £550. You can see the exact guidance and the forms to pursue the divorce here: https://www.gov.uk/divorce/overview
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