Ask an Property Solicitor. Get an Answer ASAP.
Good afternoon, i would carry out a solicitor check on the law society website. If they are regulated by the law society then you would be protected.
They should then send you thorough initial instructions. If you feel suspicious about them i would advise instructing a different solicitor.
If there is no contract with them and you have not signed any type of agreement with them to sell your property then no you are not legally bound in any way