diff --git a/london-underground/1967-tube-stock.dat b/london-underground/1967-tube-stock.dat
index 50b85cf95..29689d924 100644
--- a/london-underground/1967-tube-stock.dat
+++ b/london-underground/1967-tube-stock.dat
@@ -23,7 +23,7 @@ axles=4
 cost=1450000
 runningcost=60
 fixed_cost=7208
-sound=lul-1938-stock-ff3170.wav
+sound=the_bloke33-1972-stock.wav
 
 can_lead_from_rear=1
 bidirectional=0
@@ -87,7 +87,6 @@ cost=750000
 runningcost=0
 fixed_cost=893
 
-
 can_lead_from_rear=0
 bidirectional=1
 
@@ -218,7 +217,6 @@ axles=4
 cost=1450000
 runningcost=60
 fixed_cost=7208
-sound=lul-1938-stock-ff3170.wav
 
 can_lead_from_rear=1
 bidirectional=0
diff --git a/london-underground/1973-tube-stock.dat b/london-underground/1973-tube-stock.dat
index 43abaa36c..73a049060 100644
--- a/london-underground/1973-tube-stock.dat
+++ b/london-underground/1973-tube-stock.dat
@@ -23,7 +23,7 @@ axles=4
 cost=1650000
 runningcost=45
 fixed_cost=7375
-sound=lul-1938-stock-ff3170.wav
+sound=the_bloke33-1972-stock
 
 can_lead_from_rear=1
 bidirectional=0
@@ -349,7 +349,6 @@ axles=4
 cost=1650000
 runningcost=45
 fixed_cost=7375
-sound=lul-1938-stock-ff3170.wav
 
 can_lead_from_rear=1
 bidirectional=0
diff --git a/london-underground/1983-tube-stock.dat b/london-underground/1983-tube-stock.dat
index 61ecbfa13..4eb1251b1 100644
--- a/london-underground/1983-tube-stock.dat
+++ b/london-underground/1983-tube-stock.dat
@@ -23,7 +23,7 @@ axles=4
 cost=1550000
 runningcost=35
 fixed_cost=7292
-sound=lul-1938-stock-ff3170.wav
+sound=the_bloke33-1972-stock.wav
 
 can_lead_from_rear=1
 bidirectional=0
@@ -292,7 +292,6 @@ axles=4
 cost=1550000
 runningcost=35
 fixed_cost=7292
-sound=lul-1938-stock-ff3170.wav
 
 can_lead_from_rear=1
 bidirectional=0
diff --git a/london-underground/lul-c-stock.dat b/london-underground/lul-c-stock.dat
index c208e2865..ee733e0f5 100644
--- a/london-underground/lul-c-stock.dat
+++ b/london-underground/lul-c-stock.dat
@@ -26,7 +26,7 @@ axles=4
 cost=7000000
 runningcost=53
 fixed_cost=11833
-sound=lul-1938-stock-ff3170.wav
+sound=the_bloke33-1972-stock.wav
 
 can_lead_from_rear=1
 way_constraint_permissive[3]=3
@@ -213,7 +213,6 @@ axles=4
 cost=7000000
 runningcost=53
 fixed_cost=11833
-sound=lul-1938-stock-ff3170.wav
 
 can_lead_from_rear=1
 way_constraint_permissive[3]=3
diff --git a/sound/credits.txt b/sound/credits.txt
index 0acbecb82..1e66a2c70 100644
--- a/sound/credits.txt
+++ b/sound/credits.txt
@@ -148,6 +148,7 @@ sandeepkurissery-flock-of-sheep.wav
 The Bloke 33
 http://freesound.org/people/the_bloke33/
 the-bloke33-dennis-dart-modern.wav
+the_bloke33-1972-stock.wav
 (CC Attribution)
 
 Multithunder 227
diff --git a/sound/the_bloke33-1972-stock.wav b/sound/the_bloke33-1972-stock.wav
new file mode 100644
index 000000000..2489f465d
Binary files /dev/null and b/sound/the_bloke33-1972-stock.wav differ
diff --git a/trains/br-cl30.dat b/trains/br-cl30.dat
index f8f851a61..5617da48d 100644
--- a/trains/br-cl30.dat
+++ b/trains/br-cl30.dat
@@ -27,6 +27,7 @@ fixed_cost=19240
 # first introduced.
 increase_maintenance_after_years=6
 rolling_resistance=13
+# It is likely to be difficult to find an authentic sound for this, so use the Class 31 sound instead.
 sound=laurie-class-31.wav
 
 can_lead_from_rear=0