UK construction-legal work runs on a handful of standard forms (JCT D&B 2016, NEC4 ECC, RIBA SPSC 2020, standard commercial leases) and a handful of statutes (Housing Grants Construction Regeneration Act 1996, Landlord and Tenant Acts 1927 and 1954). The first-pass review that solicitors charge £500-£2,000 for is repetitive enough that a well-prompted LLM does it in seconds.
Closed contract-review SaaS lives on long enterprise sales cycles into law firms. Open-source toolkits live in the hands of the SMEs (architects, contractors, subcontractors, tenants) who actually feel the pain. We are picking the second route.