One crew from High Wycombe attended an incident involving an oil spill on the carriageway.
Firefighters were called to approximately 25 litres of oil that had leaked from a knocked‑over drum and spread across the road.
Crews used environmental absorbent pads and mud bank to soak up the oil and reduce the risk to road users, while a full road closure was put in place.
Thames Valley Police was also in attendance.