SJD Accountancy - UK's largest specialist Contractor Accountants FREEPHONE 0500 152500. At SJD we provide our clients, which number over 10,000 Contractors, Freelancers and Small Businesses with an unparalleled level of service. We have more qualified accountants than any other firm in our market,have won awards for customer service, are recommended by the Professional Contractors Group, hold the highest rank of any firm of accountants in the Sunday Times 'Best Companies To Work For' survey, were voted by ContractorUK as the 'Best Contractor Accountant' and are recommended by the Sunday Times. We are also one of the few firms in the UK to offer a money backed service guarantee should we fail to meet any of our published service levels. To see what our clients have to say about us read our testimonials. We have office facilities throughout the country.