Hi Mr Dude.
One option is for you to joint the ever expanding UK 'redneck' tree lopping fraternity....
....and a think we may have seen a taste of that side of the industry earlier in this thread.
If you want to do the job in a professional manner, you are going to need to collect a few bits of paper.
The UK chainsaw competence system consists of training, and then assessment.
Anyone can supply you training (within reason)- the biggest player in the UK is 'Lantra', but the assessment can either be undertaken by 'city and guilds' or 'Lantra'.
Between the two organisations, the assessments are identical and interchangeable (you can do some with Lantra, and interchange with city and guilds, but most people use city and guilds for historical reasons..... shop around, get the best price).
Once, the assessments had nice easy names like CS30 CS31, CS38 and CS39, but they have now given them stupid long names and indecipherable long numbers, sorry)
For basic tree work you will need:
Chainsaw maintenance and cross cutting (was CS30)
https://www.nptc.org.uk/qualificationschemedetail.aspx?id=333
Felling small trees (CS31)
https://www.nptc.org.uk/qualificationschemedetail.aspx?id=334
Tree Climbing and Aerial Rescue (CS38)
https://www.nptc.org.uk/qualificationschemedetail.aspx?id=337
https://www.nptc.org.uk/qualificationschemedetail.aspx?id=356
Chainsaw from rope and harness (CS39)
https://www.nptc.org.uk/qualificationschemedetail.aspx?id=350
A link to the Lantra equivalents is here...
http://www.lantra-awards.co.uk/Downloads/Training-and-Qualifications/Forest-and-Arboriculture-(duration-etc).aspx
I am not too sure who will be your nearest assessment center, these are not a million miles away
Tree Surgery Training Sussex & Kent | Chainsaw Training Courses Sussex & Kent | Approved by Lantra & NPTC
Tree Surgeon Training - Kingswood Training Services - Kingswood Training Services
other than that buddy, I don't know nuffin..... yeeehar and saddle me up a greased pig.