Iran’s ambassador in London warned on Sunday that the UK government must get its "domestic political forces" pushing for regime change under control or else the two countries will face dangerous escalation. The public statement came two days after the British-flagged Stena Impero was boarded and captured by IRGC commandos, and over two weeks after the tanker Grace 1 was seized by UK Royal Marines off Gibraltar.

Iranian Ambassador Hamid Baeidinejad urged via his personal Twitter account that continued pressure on Iran would be "unwise" given that Tehran stands “firm and ready for different scenarios”.

The ambassador said the UK government must “contain those domestic political forces who want to escalate existing tension between Iran and the UK well beyond the issue of ships” — in what appears a reference to the UK defense establishment and its allies at think tanks like the neoconservative the Henry Jackson Society and others, and powerful oil and weapons gulf allies like Saudi Arabia.

Iranian Ambassador to the UK Hamid Baeidinejad, via Iran News Daily

His statement implied that British 'deep state' elements were using the tit-for-tat tanker seizures as a convenient raison d'etre for pushing conflict with Iran.

On Friday Britain had issued its own warnings, with Foreign Minister Jeremy Hunt telling the Iranians they face "robust" and “serious consequences,” but he stopped short of discussing military options, instead his statements emphasized diplomacy. The UK has condemned it as "a hostile act" - and German Foreign Minister Heiko Maas has indicated European leaders are desperately trying to prevent "uncontrollable military escalation."

Meanwhile, more details of Iran's seizure of the still detained Stena Impero tanker have emerged. IRGC spokesman Brig. Gen. Ramezan Sharif was cited by Iran's Fars News Agency over the weekend as claiming a Royal Navy warship had attempted to put up “resistance and interference” to prevent Iran's navy from detaining the vessel.

State media released new footage showing the tanker impounded with Iran's flag raised above.

State media of #Iran's Islamic Regime just released exclusive video of the seized #UK's Oil Tanker, Stena Impero anchored in #BandarAbbas port. They brought down the #UK's flag and raised the Islamic Regime's flag in instead. pic.twitter.com/qWWFGtrff6 — Babak Taghvaee (@BabakTaghvaee) July 21, 2019

According to Sharif, Iran's military had warned the tanker several times to change course before intervening. This followed Iranian state media claiming the Stena Impero was making unsafe and dangerous maneuvers which led it to collide with an Iranian fishing boat; however, neither the UK nor any independent source has backed this interpretation.

The IRGC spokesman further alleged that UK Royal Navy helicopters tried to stop Iran's naval commandos from boarding the ship. Iran previously released dramatic video showing special forces operatives fast-roping to the tanker's deck, but there was no evidence of UK aircraft overhead.