Thats a lot of beans and eggs Bob. If it had been an increase of £300-£400 I wouldn't have given it too much thought, but upwards of £1000!!!, the seems really excessive to me.
I haven't ruled out the idea of going altogether, but when I enquired on the numbers for May 2018, just 3 weeks ago, only one person had booked. That number could well have gone up since then and there is still plenty of time to book, but I believe in May 2017 there were 18 on the trip (not 100% sure), and that in May 2016 it was fully booked (again not 100% sure). It all seems very slow off the mark for a holiday that has been very popular in the past, bearing in mind the balance needs to be paid in 3 months time.
I'm now waiting to see the full itinerary and cost for the Galapagos Islands, that might well turn out to be a holiday worth eating beans on toast for, it wont be cheap I know, but even then there is a limit to what I am prepared to spend.
Best regards
Avocet