Barbandddave

I have sold a property that was not my primary residential property, both reporting and paying tax on the gain made. I currently own some share purchased many years ago in my former employer (a USA based company) on which are valued considerably below the price that I paid for them. If I sell these shares in the same tax year as my gain on property, and report the loss in my Sell Assessment tax return, can I uses this loss to offset part of the gain on the residential property? If so how does this work with the different rates of tax applied to the gains/losses of these different asset classes?