Legum Baccalaureus. (LL. stands for "legum" of laws) or o 'LLB' is an old latin abbreviation for "Bachelor of Laws." In Latin it was common to indicate the plural of something by using its initial twice; that's why when you see a decision of three members of the court of appeal, the judges titles might be abbreviated to "Smith and Jones LJJ." Because we're supposed to be learning lots of laws, or even all the laws, we get bachelors degrees in laws , plural. The reason why the 'B' comes after the 'LL' is that Latin word order is often a bit different from English; if you translate it word by word, 'LLB' means "of laws a batchelor."
I am sure the solicitor question has been answered many times but no, on completion of your LLB you move onto an LPC (1 year Legal Practice Course) and then i believe you do a 'quilifying' year when working for a firm under a training contract.
If you don't do a qualifying law degree then you add a CPE or GDL to your list before the LPC which is also 1 year.