Hi
@yk1906 just to add my thoughts before
@Abbie Whitlock can come back to you - in my view,
you should still focus on the reasons why those experiences made you realise and later confirm that this is the ideal career for you to pursue. The fact that all your experiences are in commercial law certainly provides some evidence to the effect that you are interested in it, but it is also certainly not conclusive evidence. In theory, you could have had an initial interest in the career, and as such took on a couple of roles relating to it, only to then realise you do not enjoy it as much as you thought.
Furthermore, even if the mere experiences sufficed to prove your commitment to this career path, by themselves they still fail to answer the crucial question of
why you are interested in it, which is what firms want to find out about candidates. Once again, in theory, you may simply be motivated by its prestige, high pay, by the fact that everyone around you seems to want it, or by reasons having to do with a misconception of what commercial solicitors actually do. All of those reasons to pursue commercial law would be red flags for a graduate recruiter, and, as such, even if they know you are committed to this career path,
they want to see if your reasons for that are the right kind of reasons.
Finally, for the question about answering the "Why UK/London" question: since this is not something the firm asks you about or even suggests in a normal "Why commercial law" question, I would not be too focused on trying to answer it. Nonetheless, if a good opportunity presents itself to comment on the issue (eg your why London motivation is closely connected to a general why commercial law motivation), it would likely be fine to include it.