HardWorkTxu

I am working for the UK subsidiary of a US publicly listed company. As part of my employment, I participate in an Employee Stock Purchase Plan (ESPP), all of which are US shares. The dividend is automatically reinvested to buy fraction of the shares. All shares (including the dividend shares) have been held in the ESPP account always (approx. 10 years) and have been never taken out. A US tax also gets applied to the dividends and the sale as well. Recently I sold some shares from the plan. My questions 1) Are the dividends taxable in the UK? 2) Will I incur CGT on the shares I sold?