Four months on from the work being completed, with the bill being paid on the day of completion, I am still waiting for an invoice for my tax return and for the promised 10 year guarantee. Numerous calls asking for these items have been ignored or feeble excuses offered. Robert never reads text messages and his wife who manages the company bills is now turning on an answering machine rather than answering the phone. My strong advice is to avoid this business at all costs.