Late Payment of Commercial Debts (Interest) Act 1998: Legislation governing statutory rights to claim interest and fixed compensation for late payment in commercial transactions, including applicable interest rates for overdue payments.

Limitation Act 1980: Sets statutory time limits for bringing claims, generally 6 years for simple contracts. Essential for ensuring the debt claim isn't time-barred.

Consumer Credit Act 1974: Regulates consumer credit agreements and sets requirements for consumer notifications and regulated payment terms when dealing with consumer debt.

Common Law Contract Principles: Fundamental principles governing contract formation, validity, and breach under English and Welsh common law system.

Practice Direction on Pre-Action Conduct and Protocols: Court guidelines requiring reasonable steps before litigation, including clear payment demands and reasonable timeframes for response.

GDPR and Data Protection Act 2018: Legislation governing the proper handling of personal information and privacy considerations in business communications and record-keeping.

Consumer Rights Act 2015: Legislation ensuring fair terms in consumer contracts and providing consumer protection provisions, applicable when dealing with consumer debtors.