They’ve already been accused of trying to “buy the general election” by quietly raising the legal spending limit by £6.2 million to £32.7m in the face of concerns from the Electoral Commission over ‘undue influence’. The party has reportedly amassed a war chest of more than £70 million.

So if you want a flavour of how much cash Tories could be splashing on their bid to retain power, have a look at the document below. It’s a £114,000 invoice from Facebook to the Conservative Party — and that’s for just one month.

The bill (which Scrapbook obtained as part of the spending returns for the Rochester and Strood by-election) is dated 2 December and lists its ‘billing period’ as ‘NOV-14’.

The invoice is itemised as follows:

“Email Collection New” — £71,147.25

— £71,147.25 “Page likes – Conservatives” — £23,998.82

— £23,998.82 “4040 Likes” — £12,713.38

— £12,713.38 “Kelly Tolhurst for Rochester and Strood” — £3,084.41

— £3,084.41 “Video advertising” — £4,014.35

If this is representative, it means they could be spaffing around £1 million per year on Facebook alone.