The premise is simple, and delightfully British (actually they've been doing it in New York for years, but let's leave that aside): brunch with bottomless booze.
More enlightened eateries have been offering these set price deals - which form the perfect basis for civilised stag dos, boozy day dates or any other afternoon activity where being a bit tipsy is helpful – for years now, but recently a whole spate of established restaurants have caught on.
Here are some of the best brunches in London that also offer an unlimited refill.
The only brunch venue on this list where bringing your dog is not only allowed but encouraged, the appeal of this Soho staple is how it manages to be at once chic and refined but gloriously laid back. Call it a certain je ne sais quoi, if you must.
The food, too, is a delight: from the delicious molluscs above the door to the excellent crepes to the buffet of French charcuterie and cheese which, if you're anything like us, will see you test the concept of 'bottomless' thoroughly. Feeling a little Frenched-out? The full English is as good as any in Soho, too.
Bellini's and Bloody Mary's flow, and there's even a good range of cold press juices for those going teetotal. The best value brunch around.
Available Sundays, 11-4pm, £25 per person, lescargot.co.uk
Korean cuisine may not be your first thought when it comes to brunch, but Jinjuu will change your mind in the time it takes to wolf down a single fried chicken wing (their signature dish – with good reason).
From there the menu only gets more eye-bulging, with beautifully succulent beef skewers, some excellent grilled sea bream and platters of freshing ssam all up for grabs.
Unlike other bottomless brunches where the drinks feel like rather an afterthought, Jinjuu's spiced Kimchi Mary and Five berry Bellini are Korean takes on what everyone else is doing and all the better for it.
Available Sunday, 12-8pm, £20-35 per person, jinjuu.com
Bar + Block, King's Cross
There's never a bad time for a well-cooked steak - and if you're pairing it with limitless Prosecco, all the better.
This bright, airy open kitchen restaurant nestled around the corner from King's Cross Station offer a excellent range of South American beef with some inventive sides (the crab mac n cheese is a particular highlight), although if you can't face going 'full cow' there are more delicate options worth a try including a fish stew.
The booze end of the bargain? A £15 supplement on top of your bill will keep the bubbles flowing for 90 minutes - beware though, they do take a Polaroid of you and jot the time to make sure things don't run over. You get to keep it, though.
Available Saturday and Sunday, 10am-4pm, £15 per person supplement, barandblock.co.uk/kings-cross
Pont St, Knightsbridge
A five minute walk from Knightsbridge, Harrods and all of that, Pont St is a great little spot that is unstuffy for the area but smart enough to feel like a treat, and their new bottomless brunch is the perfect way to get acquainted.
Don't look past the grilled oysters with parmesan and garlic butter to start (accompanied by a wicked sourdough) while the salmon and brown rice kedgeree is the perfect mid morning dish.
Drinks-wise the mismosas and Bloody Marys are very good but if you're planning a boozy one you'll have to be quick – they're free flowng for two hour sittings only.
Available Sundays from 1pm, £39 per person, pontst.com
HIX Mayfair, Mayfair
The dining room at HIX Mayfair is decorated with the work of contemporary English artists including Tracey Emin and Bridget Riley, but it's the classic fare on your plate - aiming high to be the best brunch in London - that you'll remember.
Their most popular dish – 'Hix cure' – is salmon and scrambled eggs done to a level of perfection that will put your homemade efforts into perspective, while the green pea dropped scone with ham and eggs is another refreshing twist on an English classic.
Drinks-wise, Greno Champagne and Black Cow Vodka Bloody Marys tick all the right boxes to set you up for a day in London's most decadent shopping district.
Available every Saturday 12-3pm, £50 per person, hixrestaurants.co.uk
100 Wardour Street, Soho
If location counts for anything, 100 Wardour is unbeatable: the famous street is in the very heart of Soho, which may explain the cracking atmosphere. Whether you're sat in the sunny lounge at the front or the slick restaurant at the back, the feel is definitely more party time than intimate.
The starters are the highlights here, with the crispy fried squid a light delight and a salt cod brandade with poached egg that will leave you wishing you could have it as a main course.
The staff are great and the drinks – bloody mary's and champagne – come thick and fast, which after all is exactly what you want from a bottomless brunch.
Available Saturday, £22.95 for 3 courses, drinks for an added 15, 100wardourst.com
Dirty Bones, Kingly Court
Situated at the top of the bustling food square known as Kingly Court (just off Carnaby Street), Dirty Bones is an unpretentious emporium of New York-style comfort food with a brunch menu that hits the spot.
A solid burger list is the obvious draw but we particularly enjoyed the 'Slow 'n low toastie' which takes the timeless grilled bread and cheese format and adds beef rib, gherkins and a fried egg. If you're feeling healthy, the avocado on toast is another staple with an enjoyable twist: this time tomato chilli jam and olive candy.
The atmosphere and staff are good fun, and the bottomless Prosecco is assiduously poured. You'll have to climb some stairs to get there, but it is more than worth it.
Bottomless Prosecco (for up to two hours) £19pp (food charged separately). For £100pp, upgrade to bottomless Veuve Clicquot, dirty-bones.com
155 Bar & Kitchen, Farringdon Road
A brisk walk from King's Cross station is this restaurant-come-shop-come-art-space that is both culturally nourishing and - most importantly for the purposes of this list - a treat for the belly.
Bridging breakfast and lunch perfectly (as brunch, y'know, should), the menu offers everything from a first rate full English to succulent signature burger, as well as more adventurous fare like baked eggs with nduja and kabanos (spicy pork and Polish sausage, for non-meat experts).
The light, airy dining space and adjoining gallery / shop are a pleasure to drink in, too - although that may have been something to do with the excellent Prosecco served throughout.
£15 per person, unlimited for two hours, 155barandkitchen.com
What do you think is the best brunch in London? Let us know in the comments below.