Classic car insurance

It is that time of the year when I have to insure the Daimler.  It is currently insured with Lancaster Insurance.  They seem ok, but the cost has gone up significantly, although nothing has changed.  The car is a Daimler 250 v8, I am in my mid 50's, without any points, accidents or claims.  The renewal is £120, which is still cheap compared to what I pay for my normal car.  Any thoughts on the cost or on any alternative insurers who you can recommend?