First make a decision about what kinds of subjects you want to study (start thinking about it in year 11). That will be the right time to look at what the local sixth form colleges can offer you as all 6th form colleges have different strengths (and offer different subjects). For more information see Sixth Form College link.
No, You do not have to go to a sixth form it is up to you. After leaving High School you can choose where you would like to carry on your further/higher education this could be at a college or sixth form centre.
Havering Sixth Form College was created in 1991.
Hereford Sixth Form College was created in 1973.
Stockton Sixth Form College was created in 1973.
Ashton Sixth Form College was created in 1928.
Newham Sixth Form College was created in 1992.
Worcester Sixth Form College was created in 1962.
Oldham Sixth Form College was created in 1992.
Cadbury Sixth Form College was created in 1983.
Scarborough Sixth Form College was created in 1973.
Hartlepool Sixth Form College was created in 1902.
Leyton Sixth Form College was created in 1929.