Zero boost

[rikcougar]

Good morning all

Weird thing happened yesterday on my way home
Lost boost as I was driving along
No smoke, no engine management light, just very slow

Started it up this morning, switch ignition on, no fault when pressing check button
Started engine and anti pollution gear fault came up, still no boost

Took plastic cover off the engine and noticed that one of the two boost air pipes which connect to the front of the engine was squashed as if being sucked in, this returns to normal when engine is switched off, left side pipe looking at the front of the engine

Any ideas as to what the fault might be gratefully received

Many thanks in anticipation