Absolutely - you can either consult a solicitor or a barrister direct (some barristers can accept instructions direct from the public). Because these folks charge by the hour, it is a good idea if you present the facts to them in some logical order and provide as much documentation as you can.
If, rather than contesting the will per se, you want to apply for a court order to vary the provisions of the will, on the grounds that the will fails to make 'reasonable provision' for you, read through the relevant legislation to see if you're actually entitled to do so:
http://www.legislation.gov.uk/ukpga/1975/63