Most Solicitors specialise in one or more areas of law particularly in the larger firms with many partners or departments. I think it is well known that solicitors do not carry out all of the legal work themselves much of the straight forward work is passed to a suitably qualified person, unless it is complex , and solicitors will take responsibility for the work done by others. If a particular area of law is required you would be wise to investigate which firm or partner you intend to use before giving instructions, unfortunately some solicitors appear to claim to be experts in all areas of the law which may not be correct.
I think celebrity cases, particularly in motoring and assault cases appear to receive a good deal of media exposure particularly when they are found not-guilty and I think this may lead one to imagine they have special treatment but you do not hear of the many cases where people are found guilty. The law is blind and there should not be one law for celebrities and one for non-celebrities and in my experience there is not but good representation is critical if you intend to succeed.