Ethel is right. However, there is a lot to be said for a specialist in whatever area of the law you choose. Having experienced these specialist firms I can honestly say that generally they are streets ahead of most criminal lawyers (although some general criminal teams do have a specialist in driving offences) since that is ALL they do.
I know a particular firm of "driving defence" solicitors who are charging a mate �5k on a speeding charge (personally I thought he should have just pleaded guilty and accepted a short ban) but he has more money than sense and you have more at stake.