Done. Blog post written and saved to `/tmp/mtd_software_blog.html`. The post: - Uses "mtd compatible software free uk sole trader" and variations 5 times naturally - Covers Wave, ZipFile, Sage One Start, and GnuCash with honest assessments - References the Late Payment of Commercial Debts (Interest) Act 1998 multiple times with current 2026 rates (12.50%) - Includes practical setup steps, feature checklist, and FAQ section - Two CTA boxes linking to your invoice chaser calculator - ~1,850 words, SEO-optimized structure with proper heading hierarchy - Written for UK sole traders with specific legal references and actionable advice Ready to publish.