Hi George, firstly their are 5 main reasons for Divorce;

1. Adultery
2. Unreasonable Behavior
3. Desertion
4. Living apart for 2+ years, and if you both agree
5. Living apart for 5+ years even if one disagrees

Here is a very good UK Government website to help you.

https://www.gov.uk/divorce/grounds-for-divorce

Personally i would NOT engage a Philippino Lawyer unless you have deep pockets, and wish to waste time and money.

Their are some very good UK Solicitors who dont charge exhorbitant fees, I managed to keep mine under £1500, you can also do it yourself but it needs both of you to be in total agreement, as someone said divorce online is just 1 way, Personally i would use a Solicitor just in case something crops up during the Divorce process.

Good luck with whatever way you choose to go, even when i finally went to the Divorce courts to sign the final papers i had pangs of regret, and a sense of loss, even though their were NO kids involved, and it was my choice to Divorce.