Services took just one minute to open the scoring when centre Sky Burgos stormed through to score under the posts and Hannah Cataldo added the conversion.
Fifteen minutes later full-back Megan Collyer added a second try in the left corner, which Cataldo brilliantly converted,
Newton Abbot finally got into the game and had some intense pressure before half-time, but Services kept them out.
Cataldo, who was in great form with the boot, also converted that tough kick.
The visitors did pull a try back straight after that, but Services quickly added a fourth try courtesy of number eight Megan McCombie, which Cataldo again converted.
Despite picking up a yellow card late on, Devonport added a fifth try with Jones again going over in the left corner after some great passing across the line.
Although Services are top of the table, second-placed Exeter Saracens and third-placed Paignton do have games in hand on them.
Saltash’s game away at St Austell and Plymouth Argaum’s home match against Camborne in NC 3 South West (West) were both postponed on Sunday.
Ivybridge, who are top of Championship South West 2 played on Saturday and beat Oxford Harlequins 88-5 with wingers Abbie Knight and Charleigh Hopkins both getting hat-tricks. A report on that game can be found HERE.
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