Vanessa Whitburn is gay, I believe, and she was Editor of TA for many years, starting something like 20 years ago. I don't know if any of the other writers were gay but given that approaching half of them are male they wouldn't be lesbians. As for feminists, well, all I can say is that's not been reflected in the way most of the female characters live their lives.
Exhibit 1, Brenda Tucker, who chucked away several good career/educational opportunities and chose to stagnate in Ambridge for a decade instead.
Exhibit 2, Jennifer Aldridge, who has chosen a life of material comfort in spite of the many humiliations she's had to endure from being married to a serial philanderer.
Exhibit 3, Pat Archer, who used to be a feminist in the 80s but now seems to have forgotten all of that and says nothing when Rob makes contemptuous references to two 30-year-old women working hard to build a business - women Pat has known virtually all their lives, moreover - as 'village girls who got lucky'.