26a Battle in front of cathedral?not exactly. (7) I have L_O_I_Y. I may have gone wront with the I? Als0, 4d Curry's taken round in part of the house (5,6) D_E_S/_I_C_E. No idea!
18a press for one opening in most distant piece of water -
_o_r_h/_s_A_e. Looks like fourth estate? Also 25a Travel agent, knave or slave - _a_l_t. Last two! NW3