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The Refinery Plot: A MI5 Ben Mason Thriller
A terrorist plot. A hidden weapons cache. An MI5 officer thrust into the biggest challenge of his career.
In the aftermath of the First Gulf War, Britain faces a growing terrorist threat. When MI5 covert-entry specialist Ben Mason uncovers a major weapons cache in the South East of England, what appears to be a routine operation quickly reveals something far more dangerous.
Following an accident that leaves his team leader seriously injured, Ben finds himself unexpectedly promoted and forced to navigate the politics of an organisation where tradition often matters more than innovation.
While some within MI5 resist change, others recognise Ben's talent for finding answers where nobody else is looking. Armed with an unconventional approach, a sharp sense of humour, and a determination to deliver results, he is given the opportunity to reshape how his team operates.
As intelligence begins to uncover a conspiracy targeting some of Britain's most important oil refineries, Ben and his newly reorganised covert-entry team are drawn into a race against time. Their mission is to obtain the intelligence needed to stop an attack that could have devastating consequences for the nation.
They are not glamorous spies.
They are locksmiths, surveillance specialists, technicians and covert-entry experts—the men and women who quietly go where they are not supposed to be, gather the information others cannot, and leave without a trace.
To stop the terrorists, they must succeed where failure is not an option.
The Refinery Plot is the first novel in the MI5 Ben Mason series—a realistic British intelligence thriller packed with authentic tradecraft, covert operations, dark humour and the unseen realities of national security work and a dramatic conclusion involving UK special forces.
Because the most important battles are often fought in secret.
In the aftermath of the First Gulf War, Britain faces a growing terrorist threat. When MI5 covert-entry specialist Ben Mason uncovers a major weapons cache in the South East of England, what appears to be a routine operation quickly reveals something far more dangerous.
Following an accident that leaves his team leader seriously injured, Ben finds himself unexpectedly promoted and forced to navigate the politics of an organisation where tradition often matters more than innovation.
While some within MI5 resist change, others recognise Ben's talent for finding answers where nobody else is looking. Armed with an unconventional approach, a sharp sense of humour, and a determination to deliver results, he is given the opportunity to reshape how his team operates.
As intelligence begins to uncover a conspiracy targeting some of Britain's most important oil refineries, Ben and his newly reorganised covert-entry team are drawn into a race against time. Their mission is to obtain the intelligence needed to stop an attack that could have devastating consequences for the nation.
They are not glamorous spies.
They are locksmiths, surveillance specialists, technicians and covert-entry experts—the men and women who quietly go where they are not supposed to be, gather the information others cannot, and leave without a trace.
To stop the terrorists, they must succeed where failure is not an option.
The Refinery Plot is the first novel in the MI5 Ben Mason series—a realistic British intelligence thriller packed with authentic tradecraft, covert operations, dark humour and the unseen realities of national security work and a dramatic conclusion involving UK special forces.
Because the most important battles are often fought in secret.
347 pages, Kindle Edition
Published May 14, 2026
About the author
Jason Blackiston
5 booksJason Blackiston's career has involved developing specialised
equipment for police, military, and covert teams.
Working alongside manufacturers, engineers, and operational
personnel has provided him with a unique insight into the people,
technology, and practical realities that underpin security and
intelligence operations of the time. Those experiences inform the MI5
Ben Mason series of novels.
Born in Sussex, Jason now lives and works in the Midlands.
equipment for police, military, and covert teams.
Working alongside manufacturers, engineers, and operational
personnel has provided him with a unique insight into the people,
technology, and practical realities that underpin security and
intelligence operations of the time. Those experiences inform the MI5
Ben Mason series of novels.
Born in Sussex, Jason now lives and works in the Midlands.
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