diff --git a/src/saveload/saveload_common.h b/src/saveload/saveload_common.h
index 9ba4f4884a..94e5af7fec 100644
--- a/src/saveload/saveload_common.h
+++ b/src/saveload/saveload_common.h
@@ -365,6 +365,8 @@ enum SaveLoadVersion : uint16 {
 	SLV_EXTEND_VEHICLE_RANDOM,              ///< 310  PR#10701 Extend vehicle random bits.
 	SLV_EXTEND_ENTITY_MAPPING,              ///< 311  PR#10672 Extend entity mapping range.
 	SLV_DISASTER_VEH_STATE,                 ///< 312  PR#10798 Explicit storage of disaster vehicle state.
+	SLV_SAVEGAME_ID,                        ///< 313  PR#10719 Add an unique ID to every savegame (used to deduplicate surveys).
+	SLV_STRING_GAMELOG,                     ///< 314  PR#10801 Use std::string in gamelog.
 
 	SL_MAX_VERSION,                         ///< Highest possible saveload version
 
diff --git a/src/saveload/upstream/gamelog_sl.cpp b/src/saveload/upstream/gamelog_sl.cpp
index cb2176d80b..2f6e03dc28 100644
--- a/src/saveload/upstream/gamelog_sl.cpp
+++ b/src/saveload/upstream/gamelog_sl.cpp
@@ -44,11 +44,13 @@ public:
 };
 
 static char old_revision_text[GAMELOG_REVISION_LENGTH];
+static std::string revision_test;
 
 class SlGamelogRevision : public DefaultSaveLoadHandler<SlGamelogRevision, LoggedChange> {
 public:
 	inline static const SaveLoad description[] = {
-		SLEG_ARR("revision.text", old_revision_text, SLE_UINT8),
+		SLEG_CONDARR("revision.text", old_revision_text, SLE_UINT8, GAMELOG_REVISION_LENGTH, SL_MIN_VERSION,     SLV_STRING_GAMELOG),
+		SLEG_CONDSSTR("revision.text",    revision_test, SLE_STR,                            SLV_STRING_GAMELOG, SL_MAX_VERSION),
 		SLE_VAR(LoggedChange, revision.newgrf,   SLE_UINT32),
 		SLE_VAR(LoggedChange, revision.slver,    SLE_UINT16),
 		SLE_VAR(LoggedChange, revision.modified, SLE_UINT8),
@@ -65,7 +67,11 @@ public:
 	{
 		if (lc->ct != GLCT_REVISION) return;
 		SlObject(lc, this->GetLoadDescription());
-		lc->revision.text = stredup(old_revision_text, lastof(old_revision_text));
+		if (IsSavegameVersionBefore(SLV_STRING_GAMELOG)) {
+			lc->revision.text = stredup(old_revision_text, lastof(old_revision_text));
+		} else {
+			lc->revision.text = stredup(revision_test.c_str());
+		}
 	}
 
 	void LoadCheck(LoggedChange *lc) const override { this->Load(lc); }
diff --git a/src/saveload/vehicle_sl.cpp b/src/saveload/vehicle_sl.cpp
index 0c60e973b3..4a05a98018 100644
--- a/src/saveload/vehicle_sl.cpp
+++ b/src/saveload/vehicle_sl.cpp
@@ -958,7 +958,7 @@ SaveLoadTable GetVehicleDescription(VehicleType vt)
 		     SLE_VAR(Vehicle, vehstatus,             SLE_UINT8),
 		SLE_CONDVAR_X(Vehicle, current_order.dest,    SLE_FILE_U8 | SLE_VAR_U16,    SL_MIN_VERSION,          SLV_5, SlXvFeatureTest(XSLFTO_AND, XSLFI_DISASTER_VEH_STATE, 0, 0)),
 		SLE_CONDVAR_X(Vehicle, current_order.dest,    SLE_UINT16,                            SLV_5, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_DISASTER_VEH_STATE, 0, 0)),
-		SLE_CONDVAR_X(Vehicle, state,                 SLE_UINT16,                   SL_MIN_VERSION, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_DISASTER_VEH_STATE, 1)),
+		SLE_CONDVAR_X(DisasterVehicle, state,         SLE_UINT16,                   SL_MIN_VERSION, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_DISASTER_VEH_STATE, 1)),
 
 		     SLE_VAR(Vehicle, sprite_seq.seq[0].sprite, SLE_FILE_U16 | SLE_VAR_U32),
 		 SLE_CONDVAR(Vehicle, age,                   SLE_FILE_U16 | SLE_VAR_I32,   SL_MIN_VERSION,  SLV_31),