Coffee Break Cryptic

31 December

Across

1 Principal notice inserted in border in front of flower (10)
7 Poor diet Tom has skipped (7)
8 One member's naughty children (4)
10 It may be taken in court and in boathouse (4)
11 RN choose new vessel (8)
13 Spot, so we hear, for fish (6)
15 Split up northern river (6)
17 Contest for gun-runners? (4,4)
18 Delight in good shelter (4)
21 A member of the opposition in Victorian times? (4)
22 Warned bad lad about damaged tree (7)
23 Locate nuns settled in Cornish town (10)

Down

1 Entertainer taking one in lift (5)
2 Little workers getting article about saint (4)
3 I'd come to be cured by doctor (6)
4 Mistake about a garment (8)
5 Stretch vessels in river (7)
6 Soak poets at sea, as it were (2,2,5)
9 Making a grade one drink (9)
12 No crop is damaged by this creature (8)
14 Country song about people (7)
16 Injury resulting from fight with sweetheart (6)
19 Language that comes in for some slating (5)
20 Mr Livingstone has little time for this county (4)