I think you need to pay it.
http://m.zoopla.co.uk/discover/buying/q-a-new-3-stamp-duty-surcharges/#F7460wMlVok753Tt.97
谢谢大家回复，学习了！
回aipple，是只有这一套。要卖了才买大的，需要同时进行，最好是同一天实现，不然没地方住，要两小屁孩儿。
Thank you, not expecting they are being so generous 
我的计划和楼主一样，也是卖一买一。我准备先看看形势再说。
loan to value
你看这个是Consultation Results不是最后的law。
11k
可以同一天进行
You are correct for this case. Main residence is where you spend most of time.
必须是Santander啊！