The William Hobbayne Centre, home to one of the UK's oldest charities in Hanwell, has hosted many memorable events over the years where GoodGymers have lent a helping hand. From hearty dinners at Burns Night to fundraising quizzes and youth performances by the Terry Marshall Academy, the centre has seen all kinds of gatherings. But this Tuesday evening, the backyard hosted a very different kind of gig.

Taking to the stage was the 7 Scratchers Army, pioneers of the industrial symphony.

If you've never heard of them, you're clearly not keeping up with Hanwell's music scene. The 7 Scratchers Army - although not always with the same seven musicians, and not always with seven performers at all - had been touring the William Hobbayne Centre for years. Their concerts usually coincide with the start of festival season, when the weeds are at their tallest and greenest, or with the end of summer, when the wind of change sends leaves drifting into the courtyard.

Their biggest audience, however, has always been the thick carpet of moss covering the concrete. The moment the 7 Scratchers Army stepped onto the stage, the moss almost peeled itself off the ground in anticipation, eager to see the hoes gleaming in the early evening sunshine.

Like every over-the-top rock band, the Scratchers brought an outrageous collection of instruments: mighty brooms, sturdy hoes and even snow shovels, despite it being late June.

Harvey, Steph, Lena, Amy, Sevan, Richard and Kash launched enthusiastically into one of their greatest hits, filling the air with the unmistakable sounds of scraping, sweeping and scratching. The rhythmic brushing of brooms blended with the harsher percussion of hoes and shovels before giving way to the gentle rustle of dry leaves and litter disappearing into Greener Ealing bags. You might have recognised the band’s classic Smells Like Greener Ealing there. The performance was so powerful it could probably be heard as far away as Sandy Park, perhaps reaching The Green W7 or maybe even all the way to The Fox.

June from the Hobbayne Charity, the sole member of the audience for this exclusive performance, noticed that the stage lacked decoration. She decided it needed flower garlands along the fence - but there was one problem: no tools! Without missing a beat, Richard dashed home to fetch his toolbox, returning before the next song, Screwing in the Name Of, began. Moments later, the soundtrack gained an unexpected electric guitar solo: the buzz of screws being driven into the fence.

Suddenly, the whole stage burst into bloom. Steph even wore a flower behind his ear, as if he were about to go to San Francisco with flowers in his hair. Surrounded by floral garlands, with brooms, hoes and shovels still playing their final movements, the Industrial Symphony reached its grand finale: Sweep Child O' Mine. June applauded enthusiastically.

As the last notes faded, the dust settled, and the low evening sun lit up the transformed courtyard. Gone were the litter, leaves, weeds and moss. In their place stood a tidy outdoor space, brightened with colourful flowers. Only then did the seven GoodGymers realise they hadn't actually been performing a concert at all. They had been volunteering at the William Hobbayne Centre, helping prepare the outdoor space for the charity's upcoming event. They even brought the chairs and tables from the centre so they could be easily pulled out of the outdoor storage when the celebrations began. Not bad for just one hour's work!

The 7 Scratchers Army will be back on the Hanwell tour next week, this time at Elthorne Park. Fancy joining the band? Whether they become Eight or Nine Scratchers is entirely up to you: Sign up now!