去英國入境問題

halo, 我係英國讀書, 希望幫到你丫=]
1) 用hksar果一d呢, 係唔駛visa既, 除非你係stay一段好長既時間, 我easter, 屋企人黎探我, 用hksar果個, 都入到, 所以冇野的...
而學校信呢, 好多時都係唔駛既, 如果學校有收到你, 先會要, 不過佢地都唔會睇既.. (好少會睇...), 如果你自己一個人去的話, 咁有你中學果個信就會好d既, 因為英國都怕你會係果度做黑工嘛..." 如果係成家人咁去, 咁就冇問題了...
你一入到英國, 果個人會問你野既, 你照實答佢, 你係去做咩既, 會住係邊, 佢問d咩你都照答, 咁就會冇問題了=]
希望幫到你丫, 有d咩可以再email我的=]

In your case, it will be visa-free for you, as you are not intended to stay over at the moment.
I recommend you to use BN(O) instead of HKSAR.