Across 1 For the record, Berliner invented it in 1887 (10) 6 Lisp a salutation to friends (4) 10 Arms order that's not on the level (5) 11 Took the main course but possibly not a sweet (4,2,3) 12 Team not assumed to be of star quality (8) 13 It holds the unloved Emperor motionless (5) 15 Brings together a thousand donkeys (7) 17 Take a trip? (7) 19 Keep in Moscow (7) 21 Understand woodcutters make playground equipment (7) 22 Sisters admit nothing, being proper perhaps (5) 24 Settler in Panama? (8) 27 The paints set before us? (2,3,4) 28 See 20 Down 29 Church of Scotland (4) 30 It's unlikely I will introduce a new problem about a sailor (10)

Down 1 Tugs put out in a squall (4) 2 Detest boat name I concocted (9) 3 Nothing disturbs bees like being overweight (5) 4 Pupils being punished for glaring mistakes? (7) 5 Perplex with a minus sign? (7) 7 Publication for children (5) 8 A flower will transform these areas (10) 9 It may be assumed it's struck theatrically (8) 14 Used by the teacher when correcting papers? (7,3) 16 Vendors, possibly nameless (8) 18 Robs banks in order to get a polished door-fitting (5,4) 20 and 28 Across: It entitles drivers to lower cover charge (2-5,5) 21 One who shows rank subservience? (7) 23 Total issue (5) 25 Rich man returns article with polite gesture (5) 26 Lies in the water (4)