Unfortunately the side couldn't live with the newly relegated Northampton Saints and were unlucky to draw them in the 1st round of the cup, going down 15–3 at home. In 2009–10 the Pirates won the inaugural British and Irish Cup, beating Munster A 23–14 in the final at the Recreation Ground, Camborne.
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The most concrete of these plans is the proposed Stadium for Cornwall, which would be home for both the Pirates and Truro City Football Club.  The Stadium For Cornwall has received funding from Cornwall Council, and is now only awaiting £3m of funding from the UK government before construction can begin, which is expected to be provided in Spring 2019.
A further move to Camborne the next season saw attendances continued to flourish, rising to a peak of 3, 011 per game during the 2009–10 season. A move back to Penzance during the 2010–11 season heralded a steady decline in attendances, although as the county's only professional team the club still was easily the best supported. Despite their higher status, the Pirates continued to enjoy good relations with neighbouring clubs such as Redruth and Camborne, often playing home matches on Sunday so that supporters of those clubs can also attend games at the Mennaye Field. It is hoped that the proposed move back to Truro to the proposed Stadium for Cornwall will see an upturn in the club's fortunes and bring the supporters back.
Pirates remain a solid RFU Championship side, their lowest finish since being 9th in 2015–16, with highs of 3rd in 2010–11 and 2011–12. These 3rd-place finishes resulted in Pirates qualifying for the promotion play-offs. In 2010-11 Pirates beat London Welsh in the semi-final 18–10 at the Mennaye Field before succumbing to Worcester Warriors in the final over two legs, 12–21 at home and 25–20 away, 46–32 on aggregate, resulting in Worcester's promotion back to the Aviva Premiership. The following season the Pirates again won their semi-final, beating Bristol over two legs, 45–24 at home and losing 29–18 away, resulting in a 63–53 win on aggregate. Pirates again however lost in the final, this time to London Welsh, losing 21–37 at the Mennaye and 29–20 away from home, 66–41 on aggregate.
 The first stage is planned to have a capacity of 6, 000, which can be expanded to 10, 000 in phase two in the event of the Pirates being promoted. Supporters A number of promotions at the beginning of the 21st century saw the Pirates rise from south-west regional rugby all of the way up to the second division. The re-brand from Penzance & Newlyn to the Cornish Pirates for the 2005–06 season, along with relocating from Penzance to Truro, meant that the club was not only the highest ranked in the county but also the best supported, having doubled its supporter base in just over five seasons.