O’Reilly signed an 18-month deal with the club when she arrived in 2016 but will not renew her contract and is already back in the US.
Henning is also believed to have left despite signing only re-signing for the club from Lyon last summer. She spent a large part of the season injured.
As Arsenal continue their behind-the-scenes cull, Cairbre Ó Cairealláin has also left the club to return to Belfast.
The strength and conditioning coach for the Arsenal Women’s team joined in 2015 to work at the Hale End Academy.
He moved to the women’s team six months later.
“I spent three incredible years at Arsenal but now I’m going home to Belfast,” said Cairealláin to the Irish Independent supplement, ‘Seachtain’ (Irish for ‘week’). “[It was] superb with great people.”
Arsenal are already looking for a replacement for Cairealláin, advertising on site for an AWFC Assistant First Team/Academy Strength & Conditioning Coach (Consultant).
Cairealláin arrived at the club with a GAA background after obtaining a degree in sports science from the University of Limerick before training with the Adelaide Crows in Australia.
Rebecca James, Communications director at the club, said about his departure, “He and Arsene have big shoes that need to be filled.”
With the transfer window in full swing, here are some gossip snippets we’ve picked up on our rounds:
UTRECHT, NETHERLANDS – AUGUST 02: Siobhan Chamberlain of England warms up during the England Training Session at Sporting 70 on August 2, 2017 in Utrecht, Netherlands. (Photo by Maja Hitij/Getty Images)
2. Hottest property in the game at the minute, Lauren Hemp, will move from Bristol to Manchester City
DUNAJSKA LUZNA, SLOVAKIA – APRIL 09: Hannah Cain, Constance Schofield and Lauren Hemp (L-R) of England line up during the national anthem prior to the UEFA Women’s Under19 Elite Round match between England and Germany on April 9, 2018 in Dunajska Luzna, Slovakia. (Photo by Christian Hofer/Bongarts/Getty Images)
3. Some Bristol players could also be on the move to Liverpool, unhappy with the level of injuries at the club
LONDON, ENGLAND – OCTOBER 08: Danielle Carter of Arsenal and Frankie Brown of Bristol City battle for posession during the Women’s Super League 1 match between Arsenal and Bristol City at Meadow Park, Boreham Wood on October 8, 2017 in London, United Kingdom. (Photo by Naomi Baker/Getty Images)
4. West Ham are hoovering up all the Chelsea rejects and ex-players for their new manager
Official team photo: West Ham United Ladies 2017/18 via whufc.com
5. DailyCannon sources understand Matt Beard, the former Boston breakers manager, will take over at West Ham