The biggest difference between hiking in the UK and South/West India is the investment in equipment.
My shoes were initially everyday sneakers. Yeah they weren't the best for rough hiking, but they were great for most of my hikes that involved flat trails. I switched to Woodlands, which helped with longevity. Again, not a priority for casual hikers who stick to flip-flops or sandals. I never considered wearing gaiters. No idea if you can even buy them in India. We just considered water in our shoes a normal unavoidable thing. Gaiters can help keep your shoes dry to an extent, but not when you're shin deep in a flowing river. My socks were normal cotton ones. I never needed insulating ones. There was no cold to protect against. In hindsight I think wearing thick or double pairs of cotton socks would have meant less damage to my toes.
And a professional rain jacket, preferably made of weather-proof Gore-Tex for toughness. One with fleece lining in case you're hiking in cold weather. Or a fleece jumper as a mid-layer if id gets cold. A medium or heavy fleece in cold weather and a micro-fleece in not-so-cold weather. You can just wear the fleece instead of the jacket if it's merely cold but not raining. It's important to carry layers. You'd also need to wear a thermal undershirt if it's a winter hike. Thermal monkey caps or hats that protect your ears against the cold and wind are common. And so are wide brimmed hats that protect against the sun.
And then there's the brands. In India, we mostly wore what we had lying around. My total annual clothing budget for hikes was zero. In the UK, my hiking trousers are from Craghoppers, my fleece from Pierre Cardin, my jackets from many assorted places, my hat and gaiters from Karrimor, my shoes from Crivit, my socks from Gelert. It will get worse if I do winter hikes. Other common brands are Merrell, Patagonia, Berghaus, Rab, The North Face, Regatta, Marmot, Paramo and Hi-tec. And then there's the walking poles, head torches and energy bars. You could spend hundreds of pounds a year on equipment.