I looked at this just yesterday. I wanted to send £20K. The TransferreWise limit is 480K php for the reciver, about £7k. Costs about £30, so have to do 3 transferres at around £90 in total.
My bank FirstDirect, want £15 to send £20K to PHP. So on the face of it looks like that is better. However going via TW would have gotton 36K more php. So it then makes TW better.