Attached the link on the new Variant below from the BMJ.
In other words, yes there is a varied version of the virus, but no it's not anymore dangerous than the other version. It's just a slightly different version. It will still respond to the vaccine.
But overall cases are increasing so rapidly that people's movements needed to be restricted - regardless of what variant it is.
"mutations don't necessarily make them more dangerous".
"it’s unlikely that a single change would make the vaccine less effective."
"Many thousands of mutations have already arisen, but only a very small minority are likely to be important and to change the virus in an appreciable way. COG-UK says that there are currently around 4000 mutations in the spike protein."
www.bmj.com/content/371/bmj.m4857