Coffee Break Cryptic

11 September

Across

1 British sailors in American vessels (4)
3 Dismissal repeated quickly (4-4)
9 Very cold northern bird (7)
10 Wood shot away from army base (5)
11 Reference book eventually incomplete (5)
12 Organised party members, originally haphazard (6)
14 Get in a mess having a meal (6)
16 Get to grips with equipment (6)
19 Fight with energy in awkward situation (6)
21 Trainee acted oddly (5)
24 Sloth disturbed a composer (5)
25 Tonic going backwards and forwards (7)
26 Playful remarks may be injurious in time (8)
27 Captured soldier with Resistance leader in front of boat (4)

Down

1 As champion may be avoiding corporal punishment? (8)
2 Neat trail, oddly enough, in part of South Africa (5)
4 Ace has left the country, being in need of food (6)
5 Flat land is not beautiful (5)
6 Fish tricked by weed (7)
7 Old man right for the role (4)
8 More off for instruction? (6)
13 He has a project for an airport (8)
15 Parasite was first to be amused (7)
17 Conservative embraced by a sweetheart in the recess (6)
18 Her Majesty turned up with something boring or something infuriating (3,3)
20 Continue performing somewhere in London (5)
22 Many left port (5)
23 City centre providing fish (4)