Be wary about the information you are given on here as requirements and costs vary widely from country to country so some of what you will be told will not necessarily be correct for becoming a commercial pilot in the UK. For example, contrary to what you have been told in your other thread, a degree is not a requirement - reasonable GCSEs and A levels will suffice.
Before you even consider investing large amounts of money in training, it's a good idea to check that you don't have any medical conditions that would prevent you from being a commercial pilot, and perhaps even arrange to have a medical - all of the relevant information can be found at the CAA:
http://www.caa.co.uk/medical/Then it might also be worth checking that you have a suitable aptitude to be a commercial pilot:
https://www.airpilots.org/career-matter ... ude-tests/A good source for the basics on how to become a commercial pilot can be found at the UK CAA:
https://www.caa.co.uk/Blog-Posts/How-to ... ial-pilot/Some airlines have schemes for people wishing to get trained up and work for them. e.g. British Airways:
https://jobs.ba.com/jobs/futurepilot/but they have no vacancies at the moment.
One of the biggest training organisations in the UK is CAE Oxford Aviation Academy - they run ab-initio schemes for a number of airlines around the world:
http://www.caeoaa.com/but, as others have already mentioned, you will need to find considerable sums of money up-front and/or be tied in to a specific airline for a number of years while you repay the training costs (of ~£100K, plus living expenses for 2-3 years).
There are some ways of reducing the cost of getting the required flying hours, such as spending some time as a flying instructor (after you have got a commercial pilot's licence), or as a parachute aircraft pilot (which technically only requires a private pilot's licence, but most parachute clubs will require you to have considerably more than the minimum flying hours before considering you).