The Times 20,317

Across
1 Expert predicts a storm (9)
6 Brawl disrupts record gate (5)
9 Dangerous creature shown briefly in sign (7)
10 Fencing equipment left one covered with stabs (7)
11 Moorish cover girl? (5)
12 Switch in order to exploit movement in pitch (9)
14 Deplore loss of devoted head? (3)
15 Down from summit, having dropped precipitately (11)
17 An extra added to the score (5,6)
19 Exceptional as today's crossword (but not yesterday's) (3)
20 Common sense in courtroom other witnesses displayed (6,3)
22 Prohibit return of monarch in retirement (5)
24 Drop article, outwardly being at fault (7)
26 Deliveries by spinner excel (7)
27 Principle of architecture ultimately used in construction of St. Paul's (5)
28 Special letters to editor put in new place (9)

Grid
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Down
1 Bird crossing street, making track in snow (5)
2 Dangerous plant? Put a road marker outside it (7)
3 One prepared to leg it can depart in disarray (3-6)
4 To stun the audience, who's the tops in variety? (4,3,4)
5 Decline a swim (3)
6 Mounts for guns (5)
7 Blunder, the net effect of which is negative (3,4)
8 Record bird with red tail that's spotted (9)
13 Train late, so change to other arrangements (11)
14 'umble beginnings in modern flat (9)
16 Modification and repair crew in army set-up (9)
18 Old soldier has to check time with new (7)
19 Like some space travel, said to involve computer information (7)
21 Uplifting work providing support for English novelist (5)
23 Fleet attack to secure port's entrance (5)
25 Turn stone over to find fish (3)