Château d'Aiguilhe, Castillon 2015

The best growers in the less-fashionable regions of the satellite appellations Blaye, Bourg, and the old Premières Côtes have to work that bit harder to get their wines known and the quality is often exceedingly high while the prices remain sensible.

Blaye is the northernmost of these satellites, named after the town of Blaye (pronounced ‘Bly’), which sits on the varied soils of the right-hand shore of the great Gironde estuary. Merlot dominates and the majority of the wines are soft and easy-drinking, balanced and flavourful, but without the dominance of new oak. The wines are usually ready to drink much sooner than those of neighbouring Bourg.

Côtes de Bourg is a smaller region south of Blaye, where the Dordogne joins the Garonne to become the Gironde. The soils here are more homogenously clay with limestone and the wines, though still generally merlot dominated, are more robust with delectable tannins, and they benefit from a little more time in bottle as a result. They can develop extremely well with short to mid-term cellaring.

Before the draining of the marshes of the Médoc in the 17th century it was these areas that provided a good deal of the wine exported to Britain.

Castillon adjoins Saint-Emilion to the east along the Dordogne and inland to the north. It is developing a good reputation for its wines and several prestigious producers from neighbouring appellations have invested a good deal to make wine here and too very good effect alongside a number of excellent locals such as Château de Pitray. Merlot again dominates on a mixture of soils from clay to sand and gravel, though cabernet sauvignon is also has a presence.

A wider umbrella appellation controlee called simply Côtes de Bordeaux identifies special terroirs, which includes Blaye and Castillon with one or two others on the banks of the two rivers Garonne and Dordogne. The vast majority of production is red, made mostly from merlot, and there are many excellent producers here, such as Denis Dubourdieu.