Arbitration is more like going to court, and is very straightforward. The arbitrator or arbiter will be independent and an expert in the particular field concerned, and may be a member of the Chartered Institute of Arbitrators . You have to choose between court and arbitration - you cannot do both. Before going to arbitration or to court you may wish to seek an impartial opinion on the merits of your case. This is best obtained from a solicitor.
Some solicitors work in law centres or advice agencies which offer free advice.
Many solicitors in private practice offer a low-cost initial interview. Your local Citizens Advice Bureau can help you find such a solicitor. The Lord Chancellor's Department publishes a useful booklet on their web site called Resolving disputes without going to court . You can take action in the courts. This doesn't have to be expensive.