That's thanks to London being unusually hot, and that's down to the whole of British Isles being in the grips of a maniacal heatwave. 

 The good news is that you don't need to buy a whole new wardrobe to get warm-weather style nailed, but a few changes wouldn't go a miss. 

The following six upgrades will not only have you looking better, but will help stave off some of that terrifying heat too. Now, we're off to find a Mini Milk.

1 | Switch Your plain Tee to a Breton stripe

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Left: J Crew, £40 / Right: Albam, £65

We'd never warn you off a simple white crew neck – it's perhaps the most perennially stylish piece of menswear ever made – but for real timeless summer style vibes then get stripy. Like all good menswear, the Breton stripe hails from the armed forces (French Navy), and it has a canny knack of looking good on every man. Make the tee the focus and wear yours with cropped chinos or tailored shorts and white sneakers.

2 | Trade White Sneakers for Espadrilles

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Castańer, £70 / Right: Office, £35

Again, we're not slagging off white sneakers – A pair like this is a summer essential – but try switching them for espadrilles. They're simple (and often cheap), but like anything simple, if you invest in quality it can be plenty stylish enough for near-all occasions. Essentially, they're fine for work so long as they're muted, pared back and well made.

3 | Drop Cotton for Linen

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Drake's, £600 / Right: Marks & Spencer, £35

You're a wise enough man to know that heavy and synthetic fabrics have no place in the warmer months, but you might not be wearing the lightest, coolest thing you could be. For the most part, cotton is your best friend (Tees, oxford shirts, chinos, etc.) but look to upgrade to linen (or at least a mix of the two) for breezier summer dressing. Shirts are the obvious place to start, and linen trousers can be good so long as they're properly tailored - you don't want to look like an on-yacht Philip Green, do you? – but an unlined linen jacket might be the best investment. Better in the heat and good for making a statement of sprezzatura at all those weddings.

4 | Button Down Oxford to a Printed Camp Collar

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Left: Rag & Bone, £165 / Right: Gucci, £435

Loud shirts have been full on legitimised by the big brands over the past couple of seasons (see Louis Vuitton, Dolce & Gabbana, Dries Van Noten, etc.) but as with everything, the fit and quality need to be right. In terms of the former, make it loose, but not baggy. It should fit close enough that you can wear it on it's own or under a jacket, but with enough space to squeeze a vest or white tee underneath. Then in terms of quality, it should be airy, so soft cotton or silk work particularly well. Avoid those cut from 'smarter' fabrics like poplin - there's nothing businessy about a printed shirt. Another sign of quality is if the print appears on both sides of the fabric; something to look out for.

5 | Trade Flip Flops for Sandals

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Left: H&M, £30 / Right: Saint Laurent, £550

Ideally, you wouldn't be wearing flip flops in the first place. There's nothing timeless, chic or cool about a flip flop. They're good for slobbing around the house, nipping to the shops or trudging back to the car after a surf. But that's it. Good sandals on the other hand are plenty suitable for town, and even work. Dark, gladiator inspired and cut from supple leather, they're a great way to smarten up holiday attire, but if you're feeling bold, wear them with your suit to the office. A summer suit, mind - something with a shorter-than-normal leg in soft fabric like seersucker.

6 | Change Your Leather Strap for a NATO

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Left: Oris, £1300 / Left: Timex, £70

Leather's all well and good in the chillier months (and of an evening), but fabric straps are lighter, tougher and sand resistant, which is handy for the summer. Even more importantly, they're bang on trend at the moment. Tudor, Tag Heuer and Omega all offer them, but we're quite taken by Oris' new Diver 65 42mm, a reissue of one of the marque's most iconic designs.

7 | Chunky Acetate to Double Bridge

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Left: Giorgio Armani, £220 / Right: Ace & Tate, £90

Finally, to sunglasses, where the trend has moved to multiple bridges; most commonly, two. You might well be rocking a pair of acetate Wayfarers or metal frame aviators, and you should hold on to them (their time will come again), but for now opt for something with rounder lenses either side of a delicate double bridge.