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Best bug spray UK

Updated: 22 October 2026

You want one can for the insects you can see, and the amazon.co.uk search calls almost everything the best bug spray UK. There is no single winner across flies, ants, plants and bed bugs. The useful pick is the listing whose job matches the insect, with the price and the review file attached. The [bug spray](/hub/pest-control/bug-spray) table scores all six. This page names a conditional choice inside each job. Prices are the saved listings of 20 October 2026. Peter F., editor for DIY & tools at productscompared.co.uk, did not run a lab test. A purchase through our links can earn a commission at no extra cost to you.

You want one can for the insects you can see, and the amazon.co.uk search calls almost everything the best bug spray UK. There is no single winner across flies, ants, plants and bed bugs.

Our top picks

Raid Raid Rapid Action fly and wasp killer, 6 × 300 ml

Best overall

Raid Raid Rapid Action fly and wasp killer, 6 × 300 ml
8.2/10about £19.99
View offer
Provanto Provanto Ultimate Bug Killer, 2 × 1 litre

Best value

Provanto Provanto Ultimate Bug Killer, 2 × 1 litre
7.1/10about £9.98
View offer
Rentokil Rentokil Insectrol insect killer 250 ml aerosol

Rank 3

Rentokil Rentokil Insectrol insect killer 250 ml aerosol
8.6/10about £6.30
View offer
On this page
  1. 1.Best flying spray if the insects are in the room
  2. 2.Best crawling spray if you want a named active
  3. 3.Best plant spray if the pests are on the leaves
  4. 4.What to skip even if the stars look fine

Best flying spray if the insects are in the room

For flies, and for a wasp that is already indoors, the Raid Rapid Action six-pack is the evidence-led flying pick in this set. Six 300 ml aerosols, 1.8 litres, cost £19.99, about £11.11 a litre. Reviewers in hot weather describe flies dropping on a direct hit. The neutral scent is mentioned often enough to treat it as a real difference from a harsh aerosol, though choking spray still appears. No active is named. Choose the Raid duo at £8.70 only after you confirm both tins are 300 ml, because the saved volume fields disagree with the title. None of the three is a loft nest. If you have not split the jobs yet, start with the bug spray buying guide.

Best crawling spray if you want a named active

Rentokil Insectrol is the crawling pick, and it is the top pick in the full table because it is the only card that names the insecticide. One 250 ml aerosol costs £6.30 and carries 4.4 from 7,073 reviews. The smell means you ventilate. Some buyers report ants returning, or no effect on bed bugs, even though bedbugs are on the pest list. At about £25.20 a litre it is the dearest liquid here. You are paying for one named can, not for a summer's stock. If the job is flies rather than crawlers, go back to Raid or Sanmex.
Raid Raid Rapid Action fly and wasp killer, 6 × 300 ml

Testsieger

Raid Raid Rapid Action fly and wasp killer, 6 × 300 ml
8.2/10about £19.99
View offer

Best plant spray if the pests are on the leaves

Provanto Ultimate Bug Killer is the only plant product kept, so it is the plant pick by fit rather than by a contest of five triggers. Two 1 litre bottles cost £9.98, about £4.99 a litre, the lowest agreeing price per litre in the set. The nozzle has a twist-and-lock. Fifty-eight reviews is a thin file next to Insectrol or Raid. People still respray when insects return, so the two-week line is not a season's immunity. The Royal Horticultural Society's caution still applies: keep people and pets off until the foliage is dry, avoid open flowers, and do not reach for a spray as the first step. This bottle does not belong on a mattress or in a fly-filled kitchen.

What to skip even if the stars look fine

Skip a skin repellent, a wristband or a patch when the problem is insects in the room. Those products were in the raw search and were removed. They do not knock down flies. Skip every aerosol if nobody can leave the room, if you need to spray beside a naked flame, or if the job is a wasp nest rather than one insect. Skip Provanto for household flies. Skip Insectrol if you wanted a multipack of flying spray and only noticed the price. The fly and wasp killer spray UK page is the narrower choice once you already know the insects have wings and they are indoors.

Common questions

What is the best bug spray for flies in a UK kitchen?
In this set, Raid's six-pack at £19.99 is the flying pick: 4.6 from 6,783 reviews, indoor use, and a seconds claim for a direct spray or a room treatment. Flies can be back the next day, and the page names no active. Sanmex at £6.22 is the cheaper three-pack if you accept a thinner listing and 4.1 stars. Neither replaces cleaning the source of the flies.
Which multipack is the cheapest for flies?
Sanmex, three 300 ml cans for £6.22, about £6.91 a litre. Raid's six-pack is about £11.11 a litre. Provanto is about £4.99 a litre and is a plant trigger, so it is the wrong cheap option for flies. The Raid duo at £8.70 only counts if the cans match the 2 × 300 ml title.
Which spray names the insecticide for crawling insects?
Rentokil Insectrol, £6.30 for 250 ml. The saved listing names permethrin and D-allethrin and limits the product to indoor crawling insects, with long-lasting protection in the bullets. Insects may crawl off before they die. It is the top pick in the main table for that transparency, not because it is the cheapest liquid.
What should I buy for aphids or box tree caterpillar?
Provanto Ultimate Bug Killer, two 1 litre triggers at £9.98, with a claim of up to two weeks and a contact kill that reviewers describe in minutes. The review count is 58. The active is not printed on the captured page. Keep the spray off open flowers and off household flies.
Is PestShield the best bed bug spray in this set?
No. It is the only bed-bug aerosol kept, at £11.99 for six 200 ml cans, and the reviews do not support a clearance claim. Fewer bites appear in some texts. Other texts say many cans did nothing, and twelve cans in one case still ended with a professional. Read the can for the active the listing omits.
When should I not buy any of these aerosols?
Do not buy one for a wasp nest, for a room nobody can leave, or for use near a flame. Do not buy a flying aerosol as a bed-bug programme, or Provanto as a kitchen fly spray. If bed bugs persist after label-rate use, or someone has inhaled or swallowed spray, use a professional or the poisons instructions on the can.

Related pages

How to use bug spray indoors

Bug spray

Bug spray buying guide: insect, surface, then stars

Fly and wasp killer spray UK: three indoor aerosols

Bug spray vs mosquito repellent: kill spray or skin

Sources

Public UK sources used for this comparison. Shelf prices, stars and review counts are the amazon.co.uk figures captured for these six listings on 20 October 2026. Last checked 22 October 2026.

  1. HSE garden and home pesticides (retrieved 20 October 2026)
  2. HSE garden pesticide search (retrieved 20 October 2026)
  3. RHS chemical use (retrieved 20 October 2026)
  4. HSE biocidal labelling (retrieved 20 October 2026)
  5. Robert Dyas Raid directions (retrieved 20 October 2026)
  6. BPCA wasp advice (retrieved 20 October 2026)