I tried to get loads more data for this image but the weather, equipment, satellites kept messing up things! The odd streak is not a satellite though two passed close to that position at the same angle and I couldn't really pin it to anything in the subs. Very odd.
1h 48m 26X250s Gain 121(unity) Offset 4 Temp-16c
Image date, time and location: 2019-05-04 Manche, France
Telescope aperture and focal ratio: TS1506UNC f4, TS Komakorr
Camera and filters used: ZWO ASI294MC Pro, Baader Neodymnium 1.25" filter
Processing applied: Pixinsight, GIMP
(http://gallery.orpington-astronomy.org.uk/albums/userpics/10050/normal_M101_1h48m_26x250s_G121_O4_T-16_DSS_ST_GIMP.jpg) (http://gallery.orpington-astronomy.org.uk/albums/userpics/10050/M101_1h48m_26x250s_G121_O4_T-16_DSS_ST_GIMP.jpg)