After earning rave reviews last season for scoring 25 goals in the club's first Ryman North campaign, the 24 year-old has completed a two week trial at the National League's Daggers.
Barnwell stepped up earlier this season but Warner is now concentrating on spearheading his club's bid for the play-offs with Waltham Abbey at home on Saturday next up for Rob Small's side.
Small believes Warner would have no problems following the club's last graduate to their Essex neighbours if they follow up their interest.
Ahead of the weekend's action, he told echo-news.co.uk: “Since Dagenham took Shomari earlier in the season they have taken a keen interest in us. I have built up a good relationship with [manager] John Still and [scout] Terry Harris and they have watched a lot of our games.
“Brad has played well this season and scored a lot of goals so we have talked about him a lot. They invited him to train for the rest of season but he can’t take the time off work but he has shown his ability and it is a case of ‘watch this space’ at the moment."
“They aren’t taking anyone on right now as they are currently focusing on trying to win promotion to the Football League on but they are interested, really liked him and he acquitted himself well as a player and person.”
Small also revealed that the Daggers aren't the only club chasing the services of Warner.
He added: “We had an approach from a team higher up the pyramid who made a fairly attractive offer. I spoke to Dagenham and they said they wanted to give him the opportunity to earn a full-time contract.
“Bradley has now trained with full-time players and it’s important he is the same player for us now as he was before. He is a fine player and a top man as well. He is an asset on and off the pitch.
“But we are glad the players are gaining the attention their talents warrant. We are inundated with scouts watching our players which is a glowing endorsement of what we are doing here I suppose.
“Whatever happens in the summer will happen. I would love to see him at Bowers next season but I would also love to see him playing at that level.”
Images courtesy of echo-news.co.uk & footygrounds.blogspot.co.uk
Follow us: @officialrymanFL on Twitter | www.facebook.com/isthmianleague