Both will be taking up post with immediate effect.
At 66, Bater is one of the more senior and experienced managers in the league and one who has twice taken charge of Bristol Rovers on a caretaker basis.
He enjoyed a fine playing career, which took in over 220 games for Bristol Rovers where he started his playing days in 1974.
He moved to Wrexham in 1981 and added 73 games to his tally before re-joining The Gas, adding another 100-plus game`s to his tally with them.
A season with Brentford preceded a two-year spell with Cardiff City, for whom he appeared 76 times.
He won two Wales under-21 international caps and many though he was unfortunate not to have been capped at full international level.
He has been a successful manager and coach at a number of clubs, notably Bristol Rovers and Clevedon Town and previously took charge of Mangotsfield between 2009 and 2012 in which time the club reached the Emirates FA Cup Fourth Qualifying Round and Division One South play-offs
He joined Larkhall Athletic as first team manager in January 2017 - replacing his son Geraint!
Mangotsfield-born Arndale worked with Bater at Larkhall, and spent six years as a player with the Mangos, including being a member of that 2009/10 FA Cup run, as well as having been a previous captain.
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