Isis is developing sleeper cells in the UK

Islamic State (ISIS) has published a shocking step-by-step online ‘teach yourself terrorism’ manual for radicalised British fighters.

The document, hidden behind innocent looking websites on classic cars and art, details how to plan a strike in the UK without detection.

The Arabic guide, said to be written by a number of different authors, will further ignite fears that the terrorist group has placed sleeper cells in the UK, who are laying in wait to carry out attacks.

The document includes basic instructions for wannabe western jihadists on how to delete their digital footprint to avoid detection.