Hi Kawal123,
I have e-mailed home office and I got the confirmation.
Please see their reply
"Dear Sir/Madam,
Thank you for your email correspondence of 5 November.
You are not required to fill in the online form. Please use the downloaded form as you have already booked your appointment.
UKVI is keen to continually review and improve its service to our customers. To help us to do so we would be grateful if you could complete a short online survey. Please access the survey using the following link:
https://www.homeofficesurveys.homeoffic ... k/s/BQ0LU/
Yours faithfully,"