The short version
- Fly paper still works and costs around £4 for 20 strips. Start there before you buy anything electric.
- Baited outdoor traps clear flies from bins and patios, but the bait stinks. Hang them well away from where you sit.
- Fruit flies and fungus gnats need different traps. Vinegar-style catchers suit the fruit bowl, yellow sticky pads suit houseplants.
- UV zappers cost £20 to £35 and work best left on overnight in a dark kitchen. Big voltage claims matter less than lamp wattage and placement.
The early July heatwave hasn’t just sold fans. Fly control is all over Amazon UK’s Garden best-seller list this week, with a baited outdoor trap at number two and old-fashioned fly paper at number four. Warm weather speeds up the housefly’s breeding cycle, so eggs laid in Monday’s bin can be flying around your kitchen by the weekend. Here’s what Britain is buying to deal with it, and which option fits which job.
How this guide was made: desk research, not a hands-on test. We shortlist on UK availability, compare published specifications and warranty terms, and read verified UK owner reviews, discounting incentivised ratings. Prices in the comparison table are pulled live from Amazon UK. Where we have tested something ourselves, we say so on the page.
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Prices and specs last checked 5 July 2026 · how we picked
How we picked these
We started with Amazon UK’s ranked Garden and Home best-seller lists on 5 July 2026, not sponsored placements. Every pick then had to do a distinct job, because a trap that’s brilliant by the bins is useless against fruit flies in the kitchen. We favoured trap-and-kill methods over insecticide sprays, since most people want something they can leave near food and pets without worrying. Where possible we stuck to products with long review histories and ratings around four stars or better. Prices were checked on 5 July 2026 and rounded, so expect them to move a little.
At a glance
| Product | Best for | Type | Price |
|---|---|---|---|
| Zero In Outdoor Fly Trap (twin pack) | Gardens, bins and patios | Baited bag trap | around £11.50 |
| Super Ninja Fruit Fly Trap (2 pack) | Fruit flies in the kitchen | Liquid bait trap | around £10 |
| Ram fly paper (20 pack) | The cheapest fix | Sticky paper | around £4 |
| The Executioner Pro | Wasps and instant results | Electric swatter | around £23 |
| YISSVIC 20W fly zapper | Kitchens overnight | UV zapper | around £27 |
| aonova sticky traps (30 pack) | Fungus gnats on houseplants | Yellow sticky pads | around £4.50 |
Zero In Outdoor Fly Trap (twin pack)
Best for gardens, bins and patiosCurrently the second best-selling garden product on Amazon UK, and it’s easy to see why. Fill the ready-baited bag with water, hang it near the bin, and the attractant pulls flies in through a one-way funnel. No electricity, no poison, and each trap keeps working for two to three weeks.
The catch: the bait smells genuinely awful once it gets going. Hang it a good ten metres from your seating area, not on the patio itself.
Twin pack, 2 to 3 weeks per trap, non-toxic bait
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Super Ninja Fruit Fly Trap (2 pack)
Best for fruit flies in the kitchenA small pre-filled trap that sits next to the fruit bowl and quietly does its job for up to three weeks. The bait is non-toxic and the design keeps drowned flies out of sight, which puts it ahead of the classic cider-vinegar-in-a-glass trick.
The catch: it only attracts fruit flies. House flies and bluebottles will ignore it completely, so match the trap to the fly you actually have.
2 traps, up to 3 weeks each
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Ram fly paper (20 pack)
Best on a budgetThe oldest trick in the book, still sitting at number four in Amazon’s Garden best sellers. Twenty pesticide-free sticky strips for about the price of a coffee. Hang one near a window or over the bin and replace it when it’s full or dusty.
The catch: a strip of trapped flies dangling in the kitchen isn’t a good look, and removing a used one without touching the glue takes practice.
20 strips, pesticide free
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The Executioner Pro
Best for wasps and instant resultsThe best-known electric swatter in the UK, with a big head and a satisfying crack when it connects. One pass usually finishes the job, which makes it the tool of choice when a wasp gets into the conservatory and you want it gone now.
The catch: it runs on two AA batteries rather than USB charging, and unlike everything else here it only works while you’re holding it.
Large single-layer grid, 2x AA batteries
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YISSVIC 20W fly zapper
Best for kitchens overnightA plug-in UV lamp with an electrified grid and a removable tray for emptying. Leave it running in a dark kitchen overnight and it deals with whatever flew in during the day, silently enough not to bother anyone upstairs.
The catch: it needs a dark room to compete with other light sources, so results during the day or in bright rooms are patchy.
20W UV lamp, washable collection tray
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aonova yellow sticky traps (30 pack)
Best for fungus gnats on houseplantsThirty double-sided yellow pads on little stakes that push into plant pots. Fungus gnats are drawn to the colour and stick fast. If tiny flies lift off your monstera every time you water it, this is the fix, and it’s rated 4.4 stars from thousands of plant owners.
The catch: it only catches the flying adults. If larvae are living in damp compost you’ll also need to let the soil dry out properly between waterings.
30 double-sided pads with stakes
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Frequently asked questions
Why are there so many flies during a heatwave?
Heat shortens the housefly’s breeding cycle dramatically. In hot weather an egg can become an adult fly in about a week, roughly twice the pace of a mild British summer, so populations explode within days of a hot spell. Keeping bins closed and emptying them more often makes a bigger difference than any trap.
Do UV fly zappers actually work?
Indoors, yes, with caveats. They work best at night or in dim rooms where the UV lamp is the brightest thing around, placed a metre or two off the floor and away from windows. Treat the huge voltage numbers on listings as marketing. Lamp wattage and placement decide how many flies it catches.
Are baited fly traps safe around pets?
The bag-style outdoor traps use a food-based bait rather than poison, so there’s no toxicity risk, but the smell is strong enough that dogs will investigate. Hang them out of reach. Fly paper is non-toxic too, though getting it out of fur is a miserable job for everyone involved.