Rewrite the whole website content in a SEO friendly manner

I am seeking an experienced content writer with a strong medical background and expertise in SEO to undertake a comprehensive overhaul of my website, www.london-osteopathy-pilates.co.uk, comprising 140 pages. The goal is to ensure all content aligns with the latest Google guidelines, enhancing readability and engagement. Additionally, I require improvements in imagery and layout to create a more appealing user experience. Many internal pages are currently underperforming in generating business. The ideal candidate will produce grammatically sound, SEO-friendly content that effectively attracts and retains visitors.