salvation is obtained by merging with God, primarily through prayer/meditation and also avoiding the 5 evils
Sikhs don't cut their hair, because Sikhism assumes that whatever God has provided to a human is required and it should be saved, protected and respected. Same is the hair. Sikhs believes in "Sabat Soorat" : Means be in the same way God has created and keep everything gifted by GOD.
Sikhs have gurudawaras
Sikhs is not real
Since the meetings are of Sikhs, so usually Sikhs are present there.
Sikhs join the Khalsa.
Yes Sikhs have weddings.
Sikhs wear a kara, kirpan, kaccha, kanga, and kesh to show that they are Sikhs and that they are proud.
The Gurudwara is a place of worship for Sikhs.
Yes, there are about 500,000 Sikhs in the UK
Sikhs only cremate.
The holy book of Sikhs is Gurugranth Saheb.
Sikhs are individuals like everybody else. Some has allergies and others don't. There are no allergies specific to all Sikhs.