CRYPTIC CROSSWORD

Across

1. Being quick, it can quietly be involved in an incursion (5)

4. Lesser van transport, part of which may be in a train (7)

8. Non-aggression agreement TUC get re-involved in (5)

9. Check about 150 going east when they are recumbent (7)

10. It gets downtrodden by a football school (3)

11. Does such a detour cause motorist some amusement? (9)

12. In greater number and, by itself, always on the increase (4)

13. Company in the street tax one North of the Border (4)

18. End one's schooldays in tea-break (9) 20. Make one's bow, that is, after end of event (3)

21. Piece of luggage rendering any other case superfluous (4-3)

22. Our first motorway might aim to reach American resort (5)

23. Are in the habit of being siblings? (7) 24. At that point three suffered upset (5)

Down

1. Give lender his box back for such sporting fixtures (6,7)

2. When depressed, one may set off an explosion (7)

3. About to read from the sign that one is in horror of (6)

4. Deepest river part one will try very hard to reach (6)

5. Again it happens the right cure's shown to be wrong (6)

6. Excuse of not being there if one broke bail first (5)

7. If one is conforming there's to be no heeling over! (6,3,4)

14. It is found in the box, being a chemical salt (7)

15. Face six with a man who is wise (6) 16. Being blemishes, they are out of court (6)

17. Allow one to remit penny in change (6) 19. Posh transport may be available from the baker's (5)