Bulk LPG prices - do they tend to be seasonal?

pinkteapot

We've been in our first house with no mains gas for a bit over 18 months now. We'll come out of our initial two-year LPG contract with Calor in early January. Know it's a way off, but I'm seeing what look like fairly low prices mentioned on here at the minute and I'm just wondering if there's any seasonality to bulk LPG prices? Are they lower in summer? If so, do we just stay with Calor and shop around in spring-summer next year?

Or do they just vary over time based on other factors? 

Any insights from people who've had LPG longer appreciated! 

Rodders53

Read the sticky at the top of this sub-forum Bulk LPG - Cheapest suppliers / supply route?
It will likely answer all your questions.

I read the equivalent for Heating Oil (Kerosene) when I moved to this house.  It was most useful.