diff --git a/levelonepage.cpp b/levelonepage.cpp
index 8cc9704..6ae586a 100644
--- a/levelonepage.cpp
+++ b/levelonepage.cpp
@@ -81,7 +81,7 @@ void LevelOnePage::clearPage()
 //	If clearPage() is called outside constructor, we need to implement localEnhance.clear();
 }
 
-QByteArray LevelOnePage::packet(int packetNumber, int designationCode)
+QByteArray LevelOnePage::packet(int packetNumber, int designationCode) const
 {
 	QByteArray result(40, 0x00);
 
@@ -256,8 +256,7 @@ bool LevelOnePage::setPacket(int packetNumber, int designationCode, QByteArray p
 		int CLUToffset = (designationCode == 0) ? 16 : 0;
 
 		m_defaultCharSet = ((packetContents.at(2) >> 4) & 0x3) | ((packetContents.at(3) << 2) & 0xc);
-		// Don't set m_defaultNOS directly as we need to keep control bits in subclass in sync
-		setDefaultNOS((packetContents.at(2) >> 1) & 0x7);
+		m_defaultNOS = (packetContents.at(2) >> 1) & 0x7;
 		m_secondCharSet = ((packetContents.at(3) >> 5) & 0x1) | ((packetContents.at(4) << 1) & 0xe);
 		m_secondNOS = (packetContents.at(3) >> 2) & 0x7;
 
@@ -329,6 +328,43 @@ bool LevelOnePage::packetNeeded(int packetNumber, int designationCode) const
 	return PageBase::packetNeeded(packetNumber, designationCode);
 }
 
+bool LevelOnePage::controlBit(int bitNumber) const
+{
+	switch (bitNumber) {
+		case C12NOS:
+			return (m_defaultNOS & 1) == 1;
+		case C13NOS:
+			return (m_defaultNOS & 2) == 2;
+		case C14NOS:
+			return (m_defaultNOS & 4) == 4;
+		default:
+			return PageBase::controlBit(bitNumber);
+	}
+}
+
+bool LevelOnePage::setControlBit(int bitNumber, bool active)
+{
+	switch (bitNumber) {
+		case C12NOS:
+			m_defaultNOS &= 0x06;
+			if (active)
+				m_defaultNOS |= 0x01;
+			return true;
+		case C13NOS:
+			m_defaultNOS &= 0x05;
+			if (active)
+				m_defaultNOS |= 0x02;
+			return true;
+		case C14NOS:
+			m_defaultNOS &= 0x03;
+			if (active)
+				m_defaultNOS |= 0x04;
+			return true;
+		default:
+			return PageBase::setControlBit(bitNumber, active);
+	}
+}
+
 void LevelOnePage::loadPagePacket(QByteArray &inLine)
 {
 	bool lineNumberOk;
@@ -451,9 +487,6 @@ void LevelOnePage::setDefaultCharSet(int newDefaultCharSet) { m_defaultCharSet =
 void LevelOnePage::setDefaultNOS(int defaultNOS)
 {
 	m_defaultNOS = defaultNOS;
-	setControlBit(C12NOS, defaultNOS & 1);
-	setControlBit(C13NOS, defaultNOS & 2);
-	setControlBit(C14NOS, defaultNOS & 4);
 }
 
 void LevelOnePage::setSecondCharSet(int newSecondCharSet)
diff --git a/levelonepage.h b/levelonepage.h
index 28adb1e..765d0eb 100644
--- a/levelonepage.h
+++ b/levelonepage.h
@@ -43,10 +43,13 @@ public:
 	LevelOnePage();
 	LevelOnePage(const PageBase &);
 
-	QByteArray packet(int, int=0);
-	bool setPacket(int, QByteArray);
-	bool setPacket(int, int, QByteArray);
-	bool packetNeeded(int, int=0) const;
+	QByteArray packet(int, int=0) const override;
+	bool packetNeeded(int, int=0) const override;
+	bool setPacket(int, QByteArray) override;
+	bool setPacket(int, int, QByteArray) override;
+
+	bool controlBit(int bitNumber) const override;
+	bool setControlBit(int, bool) override;
 
 	void clearPage();
 	void loadPagePacket(QByteArray &);
diff --git a/loadsave.cpp b/loadsave.cpp
index 601e0bf..83f067c 100644
--- a/loadsave.cpp
+++ b/loadsave.cpp
@@ -19,10 +19,11 @@
 
 #include "loadsave.h"
 
+#include <QByteArray>
 #include <QSaveFile>
+#include <QString>
 
 #include "document.h"
-#include "levelonepage.h"
 #include "pagebase.h"
 
 // Used by TTI and hashstring
diff --git a/loadsave.h b/loadsave.h
index 3e1ba6b..7179d5e 100644
--- a/loadsave.h
+++ b/loadsave.h
@@ -20,12 +20,15 @@
 #ifndef LOADSAVE_H
 #define LOADSAVE_H
 
+#include <QByteArray>
 #include <QSaveFile>
+#include <QString>
 
 #include "document.h"
 #include "pagebase.h"
 
 int controlBitsToPS(PageBase *);
+
 void saveTTI(QSaveFile &, const TeletextDocument &);
 
 #endif
diff --git a/pagebase.cpp b/pagebase.cpp
index bcd1ba3..db84f29 100644
--- a/pagebase.cpp
+++ b/pagebase.cpp
@@ -99,7 +99,7 @@ bool PageBase::setPacketArrayIndex(int arrayIndex, QByteArray packetContents)
 
 	return true;
 }
-
+/*
 bool PageBase::deletePacket(int packetNumber, int designationCode)
 {
 	int arrayIndex = packetNumber;
@@ -119,7 +119,7 @@ bool PageBase::deletePacketArrayIndex(int arrayIndex)
 
 	return true;
 }
-
+*/
 bool PageBase::setControlBit(int bitNumber, bool active)
 {
 	m_controlBits[bitNumber] = active;
diff --git a/pagebase.h b/pagebase.h
index 4b1a513..96ccac7 100644
--- a/pagebase.h
+++ b/pagebase.h
@@ -34,19 +34,19 @@ public:
 	PageBase(const PageBase &);
 	~PageBase();
 
-	QByteArray packet(int, int=0) const;
-	bool packetNeeded(int, int=0) const;
-	bool setPacket(int, QByteArray);
-	bool setPacket(int, int, QByteArray);
-	bool deletePacket(int, int=0);
+	virtual QByteArray packet(int, int=0) const;
+	virtual bool packetNeeded(int, int=0) const;
+	virtual bool setPacket(int, QByteArray);
+	virtual bool setPacket(int, int, QByteArray);
+//	bool deletePacket(int, int=0);
+
+	virtual bool controlBit(int bitNumber) const { return m_controlBits[bitNumber]; }
+	virtual bool setControlBit(int, bool);
 
 	QByteArray packetArrayIndex(int) const;
 	bool packetNeededArrayIndex(int) const;
 	bool setPacketArrayIndex(int, QByteArray);
-	bool deletePacketArrayIndex(int);
-
-	bool controlBit(int bitNumber) const { return m_controlBits[bitNumber]; }
-	bool setControlBit(int, bool);
+//	bool deletePacketArrayIndex(int);
 
 private:
 	bool m_controlBits[11];