This is one of those 'under-the-radar' regions I love to search out, home to the finest quality wines, but not so well-known. As Wine International says, "If it weren't for the [political] line dividing Castillon from Saint-Émilion, its wines would be twice the price. The hills are the same, the soil is the same, the exposure is the same." The estate has won over 150 awards, including the Paris Lauréat Prix d'Excellence – not once, but twice – and Decanter magazine calls it the "leading estate in the Côtes de Castillon". La Clarière is our flagship wine and absolutely no expense is spared. Low yields, careful hand-sorting, months ageing in the finest new French oak, and rigorous tasting ensure only the best parcels become La Clarière. Mostly Merlot, silky, elegant, and supple, with a dash of Cabernet Sauvignon for structure, and slightly portioned Malbec and Cabernet Franc for balance. It's truly magnificent!

So we were delighted when we finally secured access to some nearby white vineyards with incredible fruit that has allowed us to create the prestigious La Clarière Blanc. This dazzling white Bordeaux combines bright, character-filled Sauvignon Blanc and richer, creamier Sauvignon Gris to create an extraordinarily sensuous wine. It has enjoyed all the same lavish, no-expense-spared treatment in the winery usually accorded to the red, and the result is a citrussy, complex, textured wine that is absolutely irresistible. Oak fermented, lees stirred, and then aged in partnew oak barrels, the richness and complexity is reminiscent of the grand wines of Pessac Léognan. Smooth, rich, long and lavish … it's simply magnificent – a very worthy partner to the red. It's a truly fine dining partner that really shines when served with luxury cuisine.

Until 1997, Château Haut Brisson was an 8-hectare estate in the Vignonet section of Saint Emilion. New owner Peter Kwok was keen to expand its vineyards and the range of terroir, so began to buy up vine parcels to make it up to the 18 hectares it has today. Judging by today's scores and the quality of the wine, Kwok purchased wisely and quality has soared. Today it is under the ownership of Stephane Schinazi and continues its stellar projection, with Michel Rolland as consultant.

All its top grapes go into this wine (they no longer make La Réserve), ageing 30% of it in new French barriques, so as not to overwwhelm the fruit with oak notes. Now certified organic, with the aim of going biodynamic too, the 2020 is a magnificent wine.

Finding a parcel of 2010 claret nine years after this 5-Star vintage was a coup for our Buyer Jean-Marc Sauboua. Critic Michael Schuster described the wines of 2010 on release as “massively elegant, fresher, firmer, more tannic”, Suckling praised them for being “very precise, focused and fresh to taste”, “dangerously good” said Jancis Robinson MW.

Médoc wines that year proved particularly good value too. The 40 hectare estate Château Carcanieux has very gravelly soils, hence its original name Carcanieux Les Graves. This encourages superb concentration and ripeness in the wines. Cabernet with Merlot, and aged in barrel, this silky claret has a fine balance of fruit and maturity, with spice from the oak. Decant and serve with steak au poivre.

Fronsac's fine Château Dalem perches high on a hill, surrounded by its 14 hectares of sloping vineyards. It's an historic estate, with records dating back to 1610, that stayed in the same family until 1955. Michel Rullier then took it over and today it's run with great success by his descendant, Brigitte Rullier-Loussert. Its vineyards are nearly all planted to Merlot, with a small amount of Cabernet Franc, and tended with meticulous care.

As you can see from critics' scores (92 points from James Suckling and 94 from Vertedevin), it is an admired claret and one that ages very well too. Matured in French oak (50% new), it has structure and length, but above all an appealing fruity depth. Perfect with roast meat or wild mushroom risotto.