Been at this a while now, but I think I may have it - Breda Ba.88 Lince?
Has an unenviable spot in the 'Worst Aircraft of WW2' list...
EDIT Bugger...beaten to the punch
found this one - 5 miles from the field and £175 for two nights - https://www.booking.com/hotel/gb/sedgebrook-hall.en-gb.html?aid=318759;label=msn-widwn42mSr49FDp4U_ju8Q-80470609531731%3Atikwd-9257490549%3Aloc-188%3Aneo%3Amte%3Alp40990%3Adec%3Aqshotels near sywell aerodrome;sid=1ff46d6efb05e0afc47392013d5b9169;all_sr_blocks=3423501_268428248_2_1_0;checkin=2022-07-08;checkout=2022-07-10;dest_id=232910;dest_type=landmark;dist=0;group_adults=2;group_children=0;hapos=4;highlighted_blocks=3423501_268428248_2_1_0;hpos=4;matching_block_id=3423501_268428248_2_1_0;nflt=ht_id%3D204;no_rooms=1;req_adults=2;req_children=0;room1=A%2CA;sb_price_type=total;sr_order=popularity;sr_pri_blocks=3423501_268428248_2_1_0__17480;srepoch=1641923574;srpvid=c1ce7dafdab90284;type=total;ucfs=1&#hotelTmpl
or - slightly more expensive but a 'known quantity' - https://www.booking.com/hotel/gb/courtyardnorthampton.html?aid=318759;label=msn-widwn42mSr49FDp4U_ju8Q-80470609531731%3Atikwd-9257490549%3Aloc-188%3Aneo%3Amte%3Alp40990%3Adec%3Aqshotels near sywell aerodrome;sid=1ff46d6efb05e0afc47392013d5b9169;checkin=2022-07-08;checkout=2022-07-10;room1=A,A;homd=1;srpvid=e9bd7dc9b3950061;srepoch=1641923931;atlas_src=hp_iw_btn
It might be worth looking at hotel bookings - provided you choose one with free cancellation, you won't be left with a room you can't get rid of if the dates are wrong...
Looks like a number of the hotels in the area are already fully booked for that weekend.
Shot down - bailed - 1 x K4 damaged.
Given the extent of the damage from a single hit (pilot wounded, both engines wrecked and on fire, controls non-responsive and airframe reduced to a collection of holes held together by aluminium) I think that was probably an 88mm that got me.