That appears to be what has just been announced on the BBC (there is a telly set up in the office at work where I am now). I haven't been able to find it confirmed online. How would it even work if the Tories
ETA Thanks to coalescent for this pointer:
BBC here: We understand that under the new agreement for fixed-term parliaments, the only way to remove the government between elections would be a vote of no confidence with the support of 55% of MPs. At present, any no confidence vote requires only 50%, plus one MP.
The Tories thus gave themselves a vote of no confidence threshold too high for the Lib Dems to challenge them. Pursuing the marriage analogy - they just took away the possibility of divorce.