The FA has granted the Southern League a limited extension to the current season but that extension has several clauses which would prevent teams like Hereford taking advantage.
This from the Southern League:
Matches can only be played after 28th April whereby a Club has fully allocated its Saturday and two midweek dates. Furthermore matches taking place after 28th April must not involve any Club that is competing for promotion, including play-off positions, or relegation.
It may be possible that the League will be required to rearrange existing fixtures in the best interests of the Competition to facilitate the aforementioned.