diff --git a/levelonepage.cpp b/levelonepage.cpp
index d55f2c8..79aafdb 100644
--- a/levelonepage.cpp
+++ b/levelonepage.cpp
@@ -37,11 +37,11 @@ LevelOnePage::LevelOnePage(const PageBase &other)
 	clearPage();
 
 	for (int i=0; i<26; i++)
-		if (other.packetNeeded(i))
+		if (other.packetExists(i))
 			setPacket(i, other.packet(i));
 	for (int i=26; i<30; i++)
 		for (int j=0; j<16; j++)
-			if (other.packetNeeded(i, j))
+			if (other.packetExists(i, j))
 				setPacket(i, j, other.packet(i));
 
 	for (int i=PageBase::C4ErasePage; i<=PageBase::C14NOS; i++)
@@ -254,7 +254,7 @@ bool LevelOnePage::setPacket(int packetNumber, int designationCode, QByteArray p
 	return PageBase::setPacket(packetNumber, designationCode, packetContents);
 }
 
-bool LevelOnePage::packetNeeded(int packetNumber) const
+bool LevelOnePage::packetExists(int packetNumber) const
 {
 	if (packetNumber <= 24) {
 		for (int c=0; c<40; c++)
@@ -263,10 +263,10 @@ bool LevelOnePage::packetNeeded(int packetNumber) const
 		return false;
 	}
 
-	return PageBase::packetNeeded(packetNumber);
+	return PageBase::packetExists(packetNumber);
 }
 
-bool LevelOnePage::packetNeeded(int packetNumber, int designationCode) const
+bool LevelOnePage::packetExists(int packetNumber, int designationCode) const
 {
 	if (packetNumber == 26)
 		return packetFromEnhancementListNeeded(designationCode);
@@ -298,7 +298,7 @@ bool LevelOnePage::packetNeeded(int packetNumber, int designationCode) const
 			return !isPaletteDefault(0,15);
 	}
 
-	return PageBase::packetNeeded(packetNumber, designationCode);
+	return PageBase::packetExists(packetNumber, designationCode);
 }
 
 bool LevelOnePage::controlBit(int bitNumber) const
diff --git a/levelonepage.h b/levelonepage.h
index 110b926..5856670 100644
--- a/levelonepage.h
+++ b/levelonepage.h
@@ -42,8 +42,8 @@ public:
 
 	QByteArray packet(int) const override;
 	QByteArray packet(int, int) const override;
-	bool packetNeeded(int) const override;
-	bool packetNeeded(int, int) const override;
+	bool packetExists(int) const override;
+	bool packetExists(int, int) const override;
 	bool setPacket(int, QByteArray) override;
 	bool setPacket(int, int, QByteArray) override;
 
diff --git a/loadsave.cpp b/loadsave.cpp
index 0d9a5c5..b0eb1a0 100644
--- a/loadsave.cpp
+++ b/loadsave.cpp
@@ -182,7 +182,7 @@ void saveTTI(QSaveFile &file, const TeletextDocument &document)
 
 	auto write7bitPacket=[&](int packetNumber)
 	{
-		if (document.subPage(p)->packetNeeded(packetNumber)) {
+		if (document.subPage(p)->packetExists(packetNumber)) {
 			QByteArray outLine = document.subPage(p)->packet(packetNumber);
 
 			outStream << QString("OL,%1,").arg(packetNumber);
@@ -203,7 +203,7 @@ void saveTTI(QSaveFile &file, const TeletextDocument &document)
 
 	auto writeHammingPacket=[&](int packetNumber, int designationCode=0)
 	{
-		if (document.subPage(p)->packetNeeded(packetNumber, designationCode)) {
+		if (document.subPage(p)->packetExists(packetNumber, designationCode)) {
 			QByteArray outLine = document.subPage(p)->packet(packetNumber, designationCode);
 
 			outStream << QString("OL,%1,").arg(packetNumber);
@@ -279,7 +279,7 @@ void saveTTI(QSaveFile &file, const TeletextDocument &document)
 
 		// FastText links
 		bool writeFLCommand = false;
-		if (document.pageFunction() == TeletextDocument::PFLevelOnePage && document.subPage(p)->packetNeeded(27,0)) {
+		if (document.pageFunction() == TeletextDocument::PFLevelOnePage && document.subPage(p)->packetExists(27,0)) {
 			// Subpage has FastText links - if any link to a specific subpage, we need to write X/27/0 as raw
 			// otherwise we write the links as a human-readable FL command later on
 			writeFLCommand = true;
@@ -337,7 +337,7 @@ void saveTTI(QSaveFile &file, const TeletextDocument &document)
 
 QByteArray rowPacketAlways(PageBase *subPage, int packetNumber)
 {
-	if (subPage->packetNeeded(packetNumber))
+	if (subPage->packetExists(packetNumber))
 		return subPage->packet(packetNumber);
 	else
 		return QByteArray(40, ' ');
@@ -388,7 +388,7 @@ QString exportHashStringPackets(LevelOnePage *subPage)
 	const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
 	QString result;
 
-	if (subPage->packetNeeded(28,0) || subPage->packetNeeded(28,4)) {
+	if (subPage->packetExists(28,0) || subPage->packetExists(28,4)) {
 		// X/28/0 and X/28/4 are duplicates apart from the CLUT definitions
 		// Assemble the duplicate beginning and ending of both packets
 		QString x28StringBegin, x28StringEnd;
@@ -399,9 +399,9 @@ QString exportHashStringPackets(LevelOnePage *subPage)
 
 		x28StringEnd = QString("%1%2%3%4").arg(subPage->defaultScreenColour(), 2, 16, QChar('0')).arg(subPage->defaultRowColour(), 2, 16, QChar('0')).arg(subPage->blackBackgroundSubst(), 1, 10).arg(subPage->colourTableRemap(), 1, 10);
 
-		if (subPage->packetNeeded(28,0))
+		if (subPage->packetExists(28,0))
 			result.append(":X280=" + x28StringBegin + colourToHexString(2) + colourToHexString(3) + x28StringEnd);
-		if (subPage->packetNeeded(28,4))
+		if (subPage->packetExists(28,4))
 			result.append(":X284=" + x28StringBegin + colourToHexString(0) + colourToHexString(1) + x28StringEnd);
 	}
 
diff --git a/pagebase.h b/pagebase.h
index f285673..3a3f8ea 100644
--- a/pagebase.h
+++ b/pagebase.h
@@ -37,8 +37,8 @@ public:
 
 	virtual QByteArray packet(int) const;
 	virtual QByteArray packet(int, int) const;
-	virtual bool packetNeeded(int i) const { return m_displayPackets[i] != nullptr; }
-	virtual bool packetNeeded(int i, int j) const { return m_designationPackets[i-26][j] != nullptr; }
+	virtual bool packetExists(int i) const { return m_displayPackets[i] != nullptr; }
+	virtual bool packetExists(int i, int j) const { return m_designationPackets[i-26][j] != nullptr; }
 	virtual bool setPacket(int, QByteArray);
 	virtual bool setPacket(int, int, QByteArray);
 //	bool deletePacket(int);