Reuters has tracked at least 22 other oil tankers to have diverted or paused since last Friday's warning from the US-led Combined Maritime Forces (CMF) in Bahrain.
Although the warring sides agreed to a draft peace roadmap to end Yemen's civil war, Houthi attacks on ships in the Red Sea and US-UK airstrikes have analysts asking if the peace plan will go ahead.
The UN Security Council on Wednesday demanded Yemen's Houthis immediately end attacks on ships in the Red Sea.
"The threat to navigational rights and freedoms in the Red Sea is a global challenge that necessitates a global response," US Ambassador Linda Thomas-Greenfield said.
Shapps warned that “The Houthis will bear (the) responsibility of the consequences should they ignore these warnings.”
"We haven't really seen the interruption to tanker traffic that everyone was expecting," said Michelle Wiese Bockmann, a shipping analyst at Lloyd's List.
Trucknet, an Israeli company, created a land bridge that offers a faster and currently safer alternative for cargo to cross from the Gulf into the Mediterranean.