No, it is generally not permissible to stay longer than the authorized period granted by your visa. Overstaying your visa in the United Kingdom or any other country is considered a violation of immigration rules and can have serious consequences.
If you need to stay longer in the United Kingdom beyond the expiration date of your visa, you should apply for an extension or change of immigration status before your current visa expires. The specific procedures and requirements for extending or changing your visa will depend on your circumstances and the type of visa you hold.
It’s important to be aware that overstaying can result in negative consequences, such as being barred from reentering the country, potential fines, or other penalties. To avoid any issues, it’s crucial to comply with the terms of your visa and maintain lawful status in the United Kingdom. If you have questions or require guidance on extending your stay, it’s advisable to consult with the UK Visas and Immigration (UKVI) or seek advice from a qualified immigration professional.