Demand for Restricted CoS has been far outstripping availability since December 2017.
Each month the Home Office sponsor panel meets on 11th to allocate restricted CoS (needed for out-of-country Tier 2 applicants). The monthly availability reduces throughout the year, from 2200 in April down to just 1000 in March.
In December 2017 the demand exceeded supply for the first time in three years, but to such an extent that only those earning in excess of £55,000 p.a. were successful. In January and February, the situation was not much better and in March it was worse again.
Fortunately, April signals the start of a new CoS year so the monthly allocation should go back up to at least 2200. This may still not be enough for those on lower salaries who may have to try yet again in May. Very frustrating for all concerned.