Lockdown Cryptic Crossword

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778
Across
  1. 1. Initially awake sore in Milton Keynes, required when sampling
  2. 3. Midday hidden in nano one
  3. 5. Compact Disc Music initially needed on construction projects
  4. 7. Starting Players Physical Education protects key workers
  5. 10. Part of our business muddles rain in me
  6. 12. RAF in reverse next to head of Airfield, distant
  7. 13. Survey type: Show illuminated charged particle
  8. 14. United Kingdom with head of America and Switzerland form important body
  9. 15. A good laugh going up? it's drooping
  10. 18. Combine Thorium, Erbium, half portion of Magnesium and Aluminium to create insulation
  11. 19. Oscar has a bit of a temperature keeping time
  12. 20. Anyone in a stom Al, you can access it online
  13. 24. Try exam again in rare situations
  14. 25. Steers horse to sports lesson, missing start of the action. Dutyholders should do this every year.
  15. 27. name tv line Ron, confused? it's all part of the business
  16. 29. Baby Joey found next to end of Fence, raise this in jubilation
  17. 30. Swindle locomotive
  18. 34. Half beat, exist
  19. 35. Comfortable with guns mix up
  20. 38. Arranged stomach exercise swaps equipment for intensity,
  21. 41. Banquet hidden in life as Teacher
  22. 42. Kier's party without you standing next to a conservative? Analysis here
  23. 45. Early Notification finishes for protective measure
  24. 47. Head of Fine Upstanding Locals mix with rough to stay at home
  25. 49. Query morning abbreviation with head of Sales finding the last ones to join
  26. 52. Tim in soap is a ladies man
  27. 54. Internal war with South for part of our business
  28. 55. Decor on amusingly hides virus
  29. 56. Hidden in Fairground, it's all around us!
  30. 58. Converted helibus is the approximate colour of Crocidolite
  31. 61. Mark, Mary and Sally initially communicate electronically
  32. 64. Queen upset over tainted Edward intially, a cost for doing business
  33. 65. Receive around question in pipe joints
  34. 67. One absorbs characters to start a fairy tale
  35. 70. Post Office Teller initially calls kettle black
  36. 72. Head of Large snakes helps surveyor reach new heights
  37. 73. White house: Missed start of dance with toilet
  38. 74. Randomly atomise brown fibre
  39. 75. Tolkein creature behind some of graveyard, hard material
  40. 76. Falling behind to cover pipework
  41. 77. Morning in the North East, it's how we know you
  42. 78. ABBA loses member in middle of hit dancing move
Down
  1. 1. Man with net game randomly produces a survey
  2. 2. Suns goes down opposite the front, frustrating event
  3. 4. Regarding where ships sail from, they tell you what you need to know
  4. 6. and Out Two events in cricket completes radio transmission
  5. 8. Island nation mixing in a herb
  6. 9. Make wheel smaller, brings your dog closer
  7. 11. Bite end off you and men, it's sticky on the floor
  8. 12. Texas' Best Osprey hiding carcinogen
  9. 16. Gate and shed holding head of Axe for key location
  10. 17. Level golf score played backwards provides musical style
  11. 18. Coating Written words with you and communist covering a bobbly material
  12. 21. Where we work Lucy loses tail and gains charged atom
  13. 22. HIJKLMNO
  14. 23. Not with former partner, start of generation software
  15. 26. Move ticks not the carrot
  16. 28. Victoria in youth lodging initially shows a type of tile
  17. 31. Greeting amongst the northerners, slim
  18. 32. gain insult confused type of board
  19. 33. Let nun muddle under ground
  20. 34. Hikers lose Hannah, led by Beatrix they ride
  21. 36. Donor in bag I've restored
  22. 37. Truth Speak it to power, it's our conference after all
  23. 39. Holds water backwards? Crazy!
  24. 40. It could go off, it went down badly
  25. 43. Corrosive liquid confused CIA and head of Department
  26. 44. Peppa's not young in this office
  27. 46. Decorate me with tops of Northern Trees for survey
  28. 48. Where the beast lurks, former PM Tony loses Brown
  29. 50. Half of aussie rockband gives praise to a
  30. 51. Billy hiding in messy store, flashing lights
  31. 53. Heads of Department concerning umbrellas will keep you clean on site
  32. 57. End of Mash is all that's left after fire
  33. 59. small remit helps identify fibres
  34. 60. Confused cult sing on for part of business
  35. 62. Dismiss Christmas Eve present carrier
  36. 63. Waster loses second half, it's in the past
  37. 66. Preparing yourself for the big event, undertaken in a classroom
  38. 68. Man with you after start of cycling, what the Welsh call Wales
  39. 69. I'm in Los Angeles, it's a capital!
  40. 71. Doc with IV randomly causes pandemic