i think it was always quick to appeal in the country you were refused in, because the ECM would look at your grounds for appeal and they could withdraw the refusal, if they didnt then they would send the appeals forms to the UK.
but if you appealled in the UK, they would send your appeal form to the ECM in Manila to reconisder your grounds for appealling, then the ECM would either withdraw the refusal or not and the appeal would go ahead, so taking longer
so it was in most cases quicker to appeal in the country you were refused (becuase the Tribuneral didnt have to send the papers to manila).