You mentioned that you daven at Lubavitch in Paris. There are a few Lubavitch shuls in Golders Green. There is Heichel Menachem, 209 Golders Green Road, NW11 020 8458 6861
There is another one in Hampstead Garden Suburb, on Kingleys Way NW11, which also has the Yeshiva.
There is another Lubavitch Yeshiva Ketana, which is on Bridge Lane NW11, off Finchley Road NW11.
Another is Chabad of Hendon, 112 – 114 Brent Street, corner of Bell Lane, Hendon NW4 Rabbi Overlander 020 8202 1600
There is a phenomoinal Shul, with the most caring Rav and Kehilla, 4 shacharit minyanim every day, 2 minchas/maariv, 2 daf yomis, gemarrah shiurim and a host of other shiurim for men and women. Bridge Lane Beth Hamedrash, 44 Bridge Lane, NW11
The Rav is Rabbi Shimon M. Winegarten 020 8458 2887
You asked for the other names and addresses of the shul mentioned previously above.
Knesset Yechezkel Beth Hamedrash, 187 Golders Green Rd, NW11 Rabbi Aharon Bassous 020 8455 4722
Netzach Yisrael Shaarei Chaim, 281 Golders Green Road, corner of Sinclair Grove, NW11 Rav Doron Ahiel 020 8455 0097
Munk’s Golders Green Beth Hamedrash (Yekke Shul), The Riding, Golders Green Rd, NW11 Rabbi Y. M. Greenberg 020 8455 2974
Here are another few shuls that might interest you.
Hager’s, 2-4 Highfield Ave, NW11 020 8458 1264
Rabbi Gershon Hager
Ohr Chadosh, 5 Brentmead Place, North Circular Rd., NW11
Rav Gelley
Kehillat Ohel Moshe, 102 Leeside Cres, corner Oakfields Rd, NW11
Rabbi Dovid Stern 07832 223 151
Nishmat Yisrael Beth Hamedrash, rear of 62 Brent St, NW4
Rabbi Dovid Tugenhaft
Kehillas Toras Chaim, Prestige Way, on Heriot Rd, NW4 020 8203 4228 Dayan Yonason Abraham
Beis Yisrael Beth Hamedrash, 34 Shirehall Park, NW4
Dayan Chanoch Ehrentreu
Hendon Adath Yisrael, 11 Brent St, NW4 020 8202 9183
Rabbi Pinchas Roberts
I sincerely hope this helps you.
There is a website FrumLondon that will tell you all information of all shops, butchers, bakeries etc. All kosher shops in London are Shomer Shabbos.
Wishing you much Hatzlacha Rabbah in all that you do.