MeadowHay. I can assure you that very few of DD's friends have connections anywhere. I am not sure how you have picked up from this thread that barristers have connections. The vast majorty do not but they have planned their entry to the Bar like a military campaign, as I said above. If you have a top notch degree, then of course you can train.
However, if you live in the NW, how many pupillages are there in Manchester each year? A handful? How many are on the GDL and then BPTC in Manchester? I do not know the answer but I bet it is multiples of the pupillage and trainee solicitor vacancies. These courses have expanded in recent years with little prospect for the majority of students getting what they want. The odds of getting pupillage are low. The cost of the GDL is usually around £9,000 and the BPTC in London is circa £19,500 plus you need accommodation if you cannot live at home. There are regional centres and in Manchester the BPTC is probably nearer £16,000. You have to apply to one of the Inns of Court for a financial scholarship (its competitive and always on merit and sometimes financial background as well) and also get one from your BPTC provider. If you can get a major one, or two, then your cost is covered.
However, you really need to research what the job entails at the entry level after pupillage. I am not joking when I quote the hours DD works. (Was that on this thread or another one?) In fact sometimes it is longer! It is a hard slog and it really only suits those who can wholly give their time when they are in their first few years of tenancy. This is not to put you off, but it is being realistic.
Yes, LLL, it should be on merit and in fact 40% of new tenants are not Oxbridge. The number of pupillages has contracted greatly in the last 10 years so Chambers can afford to be choosy. It has almost certainly knocked out most of the non RG sector and some RG. There are areas of work that are not necessarily Oxbridge heavy, eg Family. The earnings are unlikely to be stellar but you will be in court a lot and your work really does matter.
The idea that pupils at Chambers could be chosen because of Uncle Toby whilst being as thick as a plank is consigned to history and, actually, was a very long time ago! Performance in the BPTC counts for a lot too! It is not just on degree if you are applying post BPTC.