You have the best chance of making a successful claim if you use the services of a qualified public liability expert. They will listen to your case and advise you about whether you can make a valid claim. They will also assess your evidence to tell you how much the claim could be worth.
Once they have created a solid claim on your behalf, they will contact the liable party to let them know that a claim is being made against them. The defendant may choose to offer a compensation settlement straight away, or else they may try to negotiate a smaller award. If they choose not to make and offer at all, or an agreement cannot be reached, then the case may end up going to court. In these circumstances, your solicitor will advocate for you.