This machine is eligible for "white glove" delivery to large parts of northern England, fulfilled by one of our 14 depots. See list of eligible postcodes.
Every machine we supply is professionally assembled by one of our trained technicians before dispatch.
Every machine undergoes a thorough pre-delivery inspection which ensures your new machine is operating correctly, safely and is ready to use.
When we handover your new machine we will give you some instruction on the correct and safe use of your purchase. We will answer any questions you might have and also offer some instruction on basic maintenance to help you keep your new machine in good condition.
£275.00RRP
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£255.00RRP
£269.00
£285.00RRP
£298.00
£315.00RRP
£329.00
£435.00RRP
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£145.00RRP
£149.00
The Allett Kensington 20B Lawnmower is a finely engineered petrol cylinder lawn mower designed to deliver a precise, professional-style cut for small to medium-sized lawns. Built with quality and durability in mind, this mower combines smooth cutting performance with easy handling — giving you beautifully maintained turf without the fuss of larger, heavier machines.
Featuring a 20-inch (51 cm) precision cutting cylinder, the Kensington 20B delivers an exceptional grass shearing action that promotes healthier regrowth and enhances the appearance of your lawn. Its precision-ground blades work in perfect harmony with the bedknife, producing a clean, even finish that helps reduce turf tearing and fraying — ideal for formal lawns, village greens, garden borders and everyday domestic mowing.
20″ Precision Cutting Cylinder – Provides a smooth, professional-quality cut across medium lawns
Reliable Petrol Engine – Offers strong, consistent performance without the need for cables or batteries
Adjustable Cutting Height – Lets you tailor the grass length to suit different turf conditions and seasons
Rear Roller System – Improves stability and supports classic lawn striping effects
Balanced & Maneuverable Design – Easy to push and control around lawns, beds and edging
Durable Steel Construction – Built to Allett’s high-quality standards for long-lasting use
Medium domestic lawns and garden spaces
Gardeners seeking a refined lawn finish with striping
Ornamental and formal turf maintenance
Users who value petrol-powered reliability and premium cut quality
Product Type: Petrol Cylinder Lawn Mower
Cutting Width: 20″ / 51 cm
Engine: High-quality, petrol-powered engine
Cutting Height Adjustment: Multiple height settings
Roller: Rear roller included for stability and lawn striping
Deck Material: Durable steel construction
Drive: Manual push operation
With a six bladed cylinder as standard, the Allett Kensington 20B will give a precision cut to your lawn. Powered by a Briggs & Stratton engine and with a 20” (51cm) width of cut, this mower is at home on large lawns.
The height of cut is adjusted by a single point infinitely variable micro-set height of cut control and an adjustable front rake helps to lift lateral growth for an improved cut.
A zinc plated front roller and steel rear roller will ensure that you achieve that classic striped finish to your lawn.
The Kensington 20B features a split rear roller for maximum maneuverability. A foam-cushioned handle and large throttle control make this top quality mower even more refined.
Allett have fitted this mower with their Quick Cartridge (QC) system that allows the cylinder unit to be removed quickly for ease of maintenance. The cylinder cartridge can be replaced with a range of other cartridges to turn your mower into a complete lawn care system. Choose from an aerator, lawn brush, dethatcher, verticutter and lawn rake. The standard six blade cylinder cartridge can also be replaced with a ten blade cartridge for an even finer cut.
The mower's handles feature a three-position height adjustment and will fold for storage. When it comes to storing the cartridges, Allett have produced a stand to hold three cartridges. The stand can be wall or floor mounted.
The Quick Cartridge (QC) system allows your Allett Kensington to perform a range of lawncare tasks. The optional cartridges can be fitted quickly and easily in place of the cutting cylinder.
| Manufacturer | Allett |
| Model | Kensington 20B |
| Category | Petrol |
| Type | Cylinder |
| Propulsion | Self Propelled |
| Rear Roller | Yes |
| Auto Engine Stop | No |
| Key Start | No |
| Grass Collector | Yes - 70 litres |
| Cutting Width | 20"/51cm |
| Cutting Heights | 6-32mm |
| Engine | Briggs & Stratton |
| Lawn Size | Large |
| Weight | 54kg |
| Machine Warranty | 2 years in domestic use |
| Engine Warranty | 2 years in domestic use |
All machines undergo a professional assembly and rigorous testing before we dispatch.
All machines qualify for free delivery to the local area around our branches. Spare parts are delivered nationally.
Place your order online and collect for free from our branches across northern England.
We're official dealers of all the machines we sell, meaning we're qualified to give you the best aftersales support.
