A 72 year old man presents with a 4 day history of right sided pleuritic chest pain, cough & sputum. There was one episode of haemoptysis.
He has a background of COPD, GOLD B & is on a LABA/LAMA. He is an ex-smoker, no other PMH
On examination, HR 88 bpm, RR 24/min, BP 130/78mmHg, SpO2 94% on RA, calves soft, scattered wheeze throughout chest
What Investigation will you order?
Select one of the following: