Cryptic crossword

ACROSS 1. British Rail on the turn, almost late returning: how cruel! (6) 8. Find man in care first and last, though he’s sound as a bell (5) 9. Does nothing less when about to put name to plans (7) 11. Let us ape, somehow, such things as we shoulder (8) 12. Something by David for little Sarah in period after noon (5) 15. First light beard-like process following end of childhood (4) 16. A bit of an orange for a rasher-producer (3) 17. After prayer, a word to put yours truly in an environment (4) 19. Scottish water at top of Tayside – done too long? (5) 21. Put Madame ashore: she’s tenants to look after (8) 24. Tess, perhaps, losing final return, a check (7) 25. Too much water − a litre, in what’s consumed (5) 26. As film was stored, one staggered drunkenly (6) DOWN 2. Soundly studies such things as clarinettists need (5) 3. Singing, it would be most exciting to have aspiration second (8) 4. Unit, after fifty, is unaccompanied (4) 5. Oxford college servant will go out and look around (5) 6. An explosive device, worked by colliers (4) 7. Charges involved in life estimates (4) 10. Rips a sand apart for Miguel and his friends (9) 12. Thieves on the high road provide protection for batsmen (4) 13. Lava, blue version, that is worth something (8) 14. Outcome of a tie may indicate some progress at sea (4) 18. Move so smoothly yet, in the air, be powerless (5) 20. Shell product is able to be returned to the Sappers (5) 21. Contrariwise, it may take one to a lower level (4) 22. Four characters missing from notebook, retreat being secluded (4) 23. ‘And follows so the ever-running ___ With profitable labour to his grave’ (K Henry V) (4)