DAR,
This is certainly a strong issue that may or may not have had an input into this accident. The IAA and CAA (UK) have strict guide lines for the operation of Public Transport to safe guard the passengers, and pilot, hence if the OAM says the site is too small, you legally can not land there or if you do, you AOC can be revoked.
Pressure from passenger or commercial pressure is a hot topic. What defines it, what causes it, the characteristic of you pax, owners, respect received and given all have a vital roll into how situations are dealt with. But this is why we should always fall back to the rules and laws set out. They are gospel.