Which Visa form to fill-up for my parents?

[avipsaa]

Hello,

I have just become a British Citizen. I am intending to apply for my parents' visa for them to come and visit me for 4/5 months. Please could you help me understand which website to use?

There are 2 websites:
1) https://www.visa4uk.fco.gov.uk
2) https://visas-immigration.service.gov.uk/

Which website to use? Please assist. Thanks in advance.

Regards,
Avipsa

[Wanderer]

4/5 months is too long in today's climate - go for 2/3 weeks....