Whether it was the beer calling or the promise from Gloucester Brewery it would reveal its plans for the future we leave that up to you to decide, but 120 people flocked to its re-launch event.

A champion of Gloucester long before the city shed its unfashionable coat of old and remerged as the home of a stunning waterside shopping destination, the brewery has remained true to its roots and proud of them.

Those roots being in the heart of Gloucester Quays and Docks where its Brewery and Tank bar are based, and from where it recently announced a new trio of new investors - one of whom is a certain Gloucester Rugby Club owner and Cheltenham Racecourse chairman Martin St Quinton.

Hot on the heels of that news was last night's (December 5) 're-launch' and grand reveal by Jared Brown, the founder of the successful operation.

It was an event which saw the brewery redressed in its new logo and re-branded "Earth conscious" - recognition of its pledge to go carbon neutral by 2022.

News of the free beer had also reached a certain television presenter, one Nick Knowles, who enjoyed the brewery's wares alongside other guests from the county and beyond - including the most senior figures from Gloucestershire County Council.

Those listening carefully may also have heard the talk of a second Tank bar on the cards - not a million miles from the current location.

Mr Brown said: "We are shaping a really exciting future at the brewery. Very early on, we knew that this future had to be a sustainable one and we are fully committed to our Earth-conscious brewing pledge, looking at every part of what we do to see how we can do it better when it comes to the environment.

"From our energy supply, to the cars and vans we drive and even the material our T-shirts and beer mats are printed on; we are working hard to meet our deadline of being carbon neutral by 2022."

Just last month it was revealed Mr St Quinton, Simon Thomas, founder and former owner of Thomas Legal Group, and Cheltenham businessman Dave Lewins had become 35 per cent stake holders in the Gloucester business.

Mr Brown also underlined plans for a £30,000 refurbishment of the Dock-side Tank bar, a doubling its brewery sales force, plans to double brewing capacity to 800,000 pints by the end of 2020, the transformation of the upper floors of the brewery at Fox's Kiln into an event space and launch its own range of gins.

The re-launch party also heard another addition to the grand plans - vegan-friendly beers from 'leftover bread' - all part of its commitment to climate change.

Environmental consultancy Sustainable Direction, which is based across from the Docks off Southgate Street, is helping the brewery address its carbon footprint and reach its 2022 target.

Dr John Henry Looney, owner and director of Sustainable Direction, which has offices adjacent to the Docks off Southgate Streetsaid: "The first thing we have been doing is looking at the brewing process itself and how that can be made more energy efficient and also sourcing energy from a renewable source.

"Every part of the supply chain has carbon emissions from the growing of the barley and hops to the malting and transportation of the ingredients and it's about what we can do to reduce this. The brewery is also addressing how it can lower its own emissions delivering the finished beer to pubs and shops.

"What's so great about Gloucester Brewery is they do not just want to learn how to make a difference, they are actually committed to doing it and we are really pleased to be helping them on this journey."

Its 'leftover bread' ingredient certainly does not have far to travel, coming from the Authentic Bread Company in Newent.

Read more: Gloucester Rugby owner unveiled as investor behind city brewery's expansion plans 

Emily Crewe, commercial manager for the Authentic Bread Company, said: "Being an organic producer, sustainability and environmental sensitivity is at the core of what we do. We all strive towards a zero-waste neutrality but are delighted that the little waste that we cannot avoid is put to such a worthwhile, and of course delicious, cause."

The brewery is also joining forces with Gloucestershire environmental charity Vision 21 on a new sustainable food project in the city in 2020.

You can find out more at gloucesterbrewery.co.uk and join its pledge using #earthconsciousbrewing.

Pictures by Anna Lythgoe Photography and Still Moving Media.