A 17-tonne tank has smashed through a wall in London – to highlight Britain’s “other” energy crisis.

The 13ft-high ‘wall’ at Tower Bridge was obliterated by the tank after research revealed 72 per cent of adults hit a wall multiple times each week.

On average, Brits hit a wall twice a week and ultimately lose nearly 37 minutes of productivity when it strikes – just shy of 78 wasted hours a year.

Nearly half (45 per cent) report feelings of fatigue during these moments, while 40 per cent feel unmotivated, and 37 per cent lack concentration.

The research of 2,000 adults revealed others become irritable (27 per cent) and hungry (12 per cent) after hitting a wall.

The wall, crafted to represent the high carbs and sugar filled snacks 76 per cent typically reach for to boost their energy, was demolished by Grenade founder Alan Barratt, driving the protein brand’s orange ‘tank’.

But while 78 per cent acknowledge the food they are fuelling themselves with could be to blame, 52 per cent are not confident in identifying the foods causing them to feel fatigued and lack focus.

Neal Duffy, from the protein bar brand, said: “We’re a nation of hustlers, so we need to fuel our bodies the right way.

“Sugar isn’t the enemy – it just needs to show up at the right time and in the right amount.”

The research also found 39 per cent choose their snacks based on convenience rather than nutrition, although 34 per cent are interested in learning more about nutrition and switching to smarter snacking options.

Half 53 per cent are open to trying new alternatives though, with 36 per cent on the lookout for high protein, low sugar snacks options.

Sports nutritionist Lois Bright added: “Being more mindful about what we eat and when we eat it will help us manage our energy levels more efficiently.

“As a nation, we need to understand what we’re putting into our bodies and be realistic about what we’ll get out.

“Choosing drinks and snacks which are high in protein is a simple switch we can all make to ensure we have the stamina to power through our busy days.”