Hi Ollie
Had a very quick look at the archival holdings at the library - they do seem to have some information such as guardians minutes for the workhouse and also some papers prior to that such as settlement orders, bastardy orders, juries lists, leases and sale of land, registers of members on he Wesleyan Methodist circuit etc for Haworth, Keighley and area. The indexing is under BK as the main listing. e.g. BK1/3/1/65
Just looking at the entries for Haworth on WYJS online catalogue, Haworth overseers and outdoor relief in early nineteenth century is under 33D80, Bingley and Haworth township records, which are held at Bradford. They've also got a transcript of baptisms at Methodist churches, including West Lane for 1839-1928 - not sure if this is the same as the one they hold at Keighley or if the Bradford one is for longer period. On the face of it, it seems to be for earlier, but without seeing it who knows? Then there's the Haworth West Lane Wesleyan and Sunday school records, ref 62D81/4 - Including Haworth Brotherhood minutes 1907-1915, collection journals 1940-1956, Dramatic Society minutes 1938-1942, leaders' minutes 1884-1937, Mutual Improvement Society register 1888-1897, pew rents 1894-1943, pulpit notices 1942-1952, society stewards' book 1935-1942, Sunday School minutes and attendance registers 1865-1964 and trustees' minutes 1916-1947. Again, these are listed as being held at Bradford.
I think you need to get yourself up to Yorkshire to look into all of this more closely.