This sermon by Charles Spurgeon is the best explanation of free will v. predestination.
http://www.spurgeon.org/sermons/1516.htm
While many FR Calvinists claim double predestination is Biblical, Charles Spurgeon obviously does not. Given that Spurgeon is a Calvinist icon, most FR Calvinists don’t seem to mention him much.
It should be noted that the British Calvinists are far different than the Dutch Calvinists in a number of ways.