The Llanelli-based region lost the reverse fixture at Parc y Scarlets on Boxing Day 14-21.
Saturday's march began at Llanelli railway station, before heading to the town centre for the rally.
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Last year, Network Rail released footage in Llanelli to highlight the potential dangers of level crossings.
In November Llanelli-born Sir Deian was appointed the new president of the National Library of Wales.
Despite the poor start, the Llanelli-based second-row remains confident ahead of Saturday's match with the Irish.
There are three uncapped players in Prydie, fellow Ospreys flier Kristian Phillips and Llanelli's Aaron Shingler.
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Welsh representatives Rhyl play Lithuanian side Suduva away while Llanelli travel to Swedish team Gefle.
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Counsel Catherine Addy had pressed for a "usual compulsory order" winding up Llanelli AFC Ltd.
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There would also be changes to accident and emergency care at Prince Philip Hospital in Llanelli.
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The Wrexham-born midfielder has teamed with Llanelli based businessman Tony Quaglia for the project.
At least 25 firefighters from Llanelli, Tumble and Kidwelly were involved in the operation.
The coach was taking students from Coleg Sir Gar's Ammanford campus to Llanelli when it crashed.
The Llanelli side face a testing trip to Stade Francais next week, while Quins host Ulster.
Among the other famous supporters spotted outside Wembley was Llanelli-born, former Conservative leader Michael Howard.
The Wasps boss said they face some "tasty" pool games against Munster, Llanelli Scarlets and Clermont.
It would replace Theatre Elli - Llanelli's existing council run theatre and cinema complex.
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Hywel Dda Health Board wants to change accident and emergency care at Prince Philip Hospital in Llanelli.
Llanelli's new 15, 000-seater Parc Y Scarlets home opened last year as Stradey Park made way for housing.
There are collection boxes in the Avenue Villa Surgery and the offices of the Llanelli Star newspaper.
Organisers say people have also donated bedding, toiletries and other essentials for the family in Llanelli, Carmarthenshire.
The head teacher said the boy, from Llanelli, in Carmarthenshire, was "a follower more than a leader".
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We've got a tough time coming in Llanelli, but with a bit of luck you never know.
Eastwood is proud of his strong gypsy roots, and was sure his grandfather was born near Llanelli.
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Elsewhere in Wales, 1, 000 workers are employed at Trostre in Llanelli and 800 at Shotton in Flintshire.
Llanelli-born Nigel Davies, 43, won 29 caps at centre between 1988 and 1997, captaining his country against France in 1996.
Krupp Camford Pressings in Llanelli has already said it will have to let go 60 temporary staff.
That will follow the opening two fixtures which are expected to be semi-professional games involving Llanelli RFC.
Mr Colling's talent with matchsticks has already seen him stage an exhibition of his models at Llanelli library.
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Sessions were held in the Abertawe Bro Morgannwg area, while a first clinic took place in Llanelli, Carmarthenshire.
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Fire authority chiefs are to meet later on Tuesday to discuss changes at Llanelli fire station in Carmarthenshire.
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