How many diazepam can I legally bring back from Portugal to England?

In the UK, it is legal to bring back a limited supply of prescribed medications for personal use. For diazepam, you are generally allowed to carry a maximum of three months' supply, provided you have a prescription. However, it's crucial to ensure that you comply with both UK regulations and any specific laws of Portugal regarding the export of medication. Always check the latest guidance from the UK government or the local embassy before traveling.