Some people use spray-on tan ahead of the summer. But not GoodGymers. GoodGymers don't like fake tans. They prefer the real thing - those awkward tan lines on your wrist from your watch, or around your socks - every mark earned during a task on a hot summer's day.

What makes a beautiful GoodGymer, you may ask?

GoodGymers come in all shapes, sizes, colours, genders and ages. Rather than an even, sleek fake tan, the true symbols of beauty are bramble scratches, nettle stings, a bit of mud sprayed across your legs (or maybe even your face) and the occasional thorn caught in your arm. But the most beautiful thing is the smile. The smile when you show up as your true self, with a genuine intention to do something good. And the even bigger smile after the task, when you see the impact of your efforts reflected in the smiles of the people you've helped. That's the most beautiful thing.

Sevan and Kash wanted to see the smile on Ms B's face again. They had visited her before, tackling all sorts of interesting jobs: from throwing old toilets into a skip to dismantling old wardrobes, and they may even have built some furniture along the way. Ms B was indeed delighted to see them again and recognised them immediately. Her dog, Rosie, must have remembered the GoodGymers too, greeting them at the door in the hope of earning a few cuddles.

Although the mission had only been confirmed at the last minute the previous day, giving Ms B little time to prepare, she was full of enthusiasm and eager to get started. She and her carer had already made some improvements around the garden, but there was still plenty left to do. The first priority was the patio (which consisted of two parts). Ms B wanted to clean it but needed some help setting up her new pressure washer, whose pronunciation became the subject of a debate. Sevan pronounced "Kärcher" the British way, while Kash insisted on the proper German pronunciation - as authentic as Germany's eastern neighbour could make it.

While Kash assembled the Kärcher following the instructions, Sevan sorted out the new hosepipe. Soon it was time to test whether Ms B's two latest purchases would work well together. Thankfully, they did. Although Ms B had originally said she might leave the pressure washing until later with her carer, she became so excited after a short demonstration that she grabbed the spray lance herself and started blasting the patio slabs with great enthusiasm. Occasionally, she sprayed the GoodGymers as well, which, on such a hot day, was a welcome bonus after a week of sizzling and sticky summer tasks. She also thoughtfully soaked the area where Sevan and Kash would be weeding. Without the extra water, the ground would have been rock hard, so that small act made a huge difference.

Before the pressure washing could properly begin, Sevan and Kash cleared the patio of everything that stood in the way. They moved heavy bags of rubble and soil that would eventually go into a skip, carried old dried branches to one side, and shifted pots to create a clear working area. With the patio finally prepared, they turned their attention to the lawn (without grass) in the middle. Armed with a spade and new hand trowels, they dug out dandelions and other stubborn weeds, working through the freshly watered soil, which was soft and muddy despite the scorching summer heat.

After just over 90 minutes, everything and everyone in Ms B's back garden looked more beautiful: the lawn, with fewer weeds; the patio, much tidier after its first round of pressure washing; and Sevan, Kash and Ms B, all three sprinkled with hundreds of tiny muddy freckles after Ms B's joyous slab spraying. Even Rosie got her paws into the freshly watered soil and proudly left a trail of muddy paw prints across the living room carpet - that, perhaps, was a little less beautiful.

What a beautiful summer afternoon mission it was!