Northampton goalkeeper Freddy Hall believes the sky is the limit for him now he’s working with former England shot-stopper Tim Flowers on a regular basis this season.The 26-year-old, who signed a one-year contract at Sixfields Stadium last month, is determined to make the most of his “immense” opportunity and believes he can only improve under the tutelage of Cobbers keeper coach Flowers.“Tim Flowers has been arguably one of the best goalkeepers of his era,” Hall told the Northampton Chronicle and Echo. “His track record speaks volumes and his experience has really helped me thus far. It’s going to be immense.“Tim’s been to the highest level and he’s proved himself over and over. He even had the opportunity to play for England so with his experience alone, the sky’s the limit.”The ex-St George’s keeper has featured in two of Northampton’s pre-season friendlies, against Reading and Nottingham Forest, and hopes to be challenging for Sam Walker’s number one jersey before too long.“I think my agility, athleticism... I’m pretty tall so I can leap pretty far and high,” said the Bermuda international, who was staying in the town with his sister when his trial with Cobblers came about at the end of last season.“I’m looking to work on the finer details. Tim can help me become a better goalkeeper at certain points. I can’t wait to have the opportunity to play.”Hall, who played for Bermuda Hogges last summer, is no stranger to working with former Premier League keepers. He was mentored and coached by ex-Newcastle and Trinidad gloveman Shaka Hislop at Quinnipiac University.“I played in the USL League. Bermuda actually had a team in that league so we were playing in that summer before last,” added the former Plymouth trialist.“It’s a good league, not as competitive as league two or even higher English leagues but it’s been a good experience.”Flowers made 175 appearances for Blackburn Rovers and won 11 England caps.