Object of the Week dives the depths this week for items that were recovered from a vessel which sank in Scotland in 1895 – but which have provided a valuable insight into the best of British brewing.

THREE bottles of beer recovered from a ship wrecked 125 years ago have helped provide insights into the make-up of ancient ales.

Research from Brewlab and the University of Sunderland has retrieved live brewing yeasts from the century old bottles of beer to provide detailed information of the microbology of lost Victorian and Edwardian stock ales.

Three bottles were retrieved by divers of Global Underwater Explorers from the shipwrecked vessel Wallachia which sank after a collision in the Clyde estuary in 1895.

The ship carried a mixed cargo including whisky and beer from the McEwan’s brewery in Glasgow. Two additional bottles were from the Bass brewery in Burton upon Trent and contained a 1902 ten per cent ABV barley wine brewed for a visit by King Edward VII.

The Northern Echo: A seal from the beer brewed for a visit by King Edward VIIA seal from the beer brewed for a visit by King Edward VII

Both beers represent examples of the stock ales commonly reputed as the best of British brewing due to their complex yeast character, high alcohol levels and long maturation.

The study, published in the Journal of the Institute of Brewing, analysed microbial DNA in the bottles by next generation sequencing, identifying the yeasts and bacteria initially present.

The research confirmed that traditional beers were fermented with a mix of yeast species. Lactic acid bacteria were also identified and would contribute to the complexity of the beer.

Analysis of the beer provided information on the alcohol strength, bitterness, pH, colour and residual sugars so allowing recipes to be developed.

Brewlab director, Dr Keith Thomas, said “This is a long running project in collaboration with Global Underwater Explorers who visited the Wallachia wreck three times to retrieve bottles.

The Northern Echo: The Brewlab director, Dr Keith Thomas, whose research has provided a valuable insight into Victorian and Edwardian brewingThe Brewlab director, Dr Keith Thomas, whose research has provided a valuable insight into Victorian and Edwardian brewing

“Our analyses provide a unique insight into the microbiology of Victorian and Edwardian brewing which is often felt to be a golden era of beers. We were very fortunate to isolate living yeast which we are studying in more detail.”

Dr Lewis Bingle, from the University of Sunderland, said: “The use of advanced molecular biology is increasingly helping us to investigate artefacts. This is a good example of where the past can provide insight to future brewing.

“We look forward to tasting the recreation compared to today’s beers.”

Andrew Pilley, of Global Underwater Explorers, said: “The level of analysis and findings presented by the team at Brewlab has been fascinating. I am really pleased that our recovery of these bottles has facilitated this project and I look forward to any future developments with the research.’’