terenchion,
Experience and opinion are one thing.
Legality is another.
As you said you have you own experiences and you own opinion.

I suggest you focus on legality.
You know already the law both in UK (10,000 Euros) and Philippines (10,000 USD +
10,000 peso)
Please double check with UKBA and with Bangko Sentral to be certain.

To be honest I don't know the reality of checks in Phils.
BUT in UK you can be legally challenged to provide proof of ownership, source and reason for carrying over GBP1000 in or out. Of course not normally an issue.
Just be sure you can comply.

Outside of these guidelines (experience and opinion) is down to your own personal risk assessement.
Maybe you will be checked maybe not. Bit like bringing 5000 ciggies to Uk without declaration. Except with ciggies maybe its just a warning and confiscation. With cash
you WILL face money laundering issues and potential incarceration.
Deal or no Deal