Ad hoc Virtual Assistant (Remote)

We are a small office based in Central London (we do commercial property management) and now have a need for virtual assistance from time to time. Initially this could be up to 10 hours per week, but it may increase in the future. We would look to work for the first week / 8 to 10 hours on a trial basis to see how well we work together. Work will involve powerpoint presentations, excel spreadsheets (expense reconciliation mostly), proof reading of legal documents (related to commercial property), some website content management, updating the site, making sure all spelling and grammar is correct, and other general office admin related tasks including drafting correspondence. Starting date is during December for the trial and then from January.