The good days to buy or begin in London: Guru Pushya, Ravi Pushya, Amrit Siddhi, Sarvartha Siddhi, Dwipushkar and Tripushkar yoga, with their timings.
Tuesday, 1 September6:12 AM - 10:12 PM · Amrit Siddhi · Ashwini nakshatra
6:12 AM - 10:12 PM · Sarvartha Siddhi · Ashwini nakshatra
Wednesday, 2 September9:13 PM - 6:15 AM, 3 Sept · Sarvartha Siddhi · Krittika nakshatra
Monday, 7 September1:44 PM - 6:23 AM, 8 Sept · Sarvartha Siddhi · Pushya nakshatra
Tuesday, 8 September12:09 PM - 6:25 AM, 9 Sept · Sarvartha Siddhi · Ashlesha nakshatra
Saturday, 12 September6:30 AM - 8:25 AM · Tripushkar · Uttara Phalguni nakshatra
Sunday, 13 September6:31 AM - 8:37 AM · Amrit Siddhi · Hasta nakshatra
6:31 AM - 8:37 AM · Sarvartha Siddhi · Hasta nakshatra
Wednesday, 16 September12:52 PM - 6:38 AM, 17 Sept · Amrit Siddhi · Anuradha nakshatra
12:52 PM - 6:38 AM, 17 Sept · Sarvartha Siddhi · Anuradha nakshatra
Thursday, 17 September6:38 AM - 3:23 PM · Sarvartha Siddhi · Anuradha nakshatra
Sunday, 20 September12:04 AM, 21 Sept - 6:44 AM, 21 Sept · Sarvartha Siddhi · Uttarashadha nakshatra
Monday, 21 September2:37 AM, 22 Sept - 6:46 AM, 22 Sept · Sarvartha Siddhi · Shravana nakshatra
Tuesday, 22 September4:39 AM, 23 Sept - 6:47 AM, 23 Sept · Dwipushkar · Dhanishta nakshatra
Sunday, 27 September5:46 AM, 28 Sept - 6:55 AM, 28 Sept · Sarvartha Siddhi · Ashwini nakshatra
Tuesday, 29 September3:06 AM, 30 Sept - 6:59 AM, 30 Sept · Sarvartha Siddhi · Krittika nakshatra
Wednesday, 30 September6:59 AM - 7:00 AM, 1 Oct · Sarvartha Siddhi · Krittika, then Rohini nakshatra
Guru Pushya is Thursday in Pushya nakshatra, Ravi Pushya is Sunday in Pushya. Amrit Siddhi is a weekday in its own nakshatra (Sunday Hasta, Monday Mrigashira, Tuesday Ashwini, Wednesday Anuradha, Thursday Pushya, Friday Revati, Saturday Rohini). Sarvartha Siddhi is a weekday in one of its favorable nakshatras. Dwipushkar and Tripushkar fall on a Sunday, Tuesday or Saturday with Dwitiya, Saptami or Dwadashi tithi and a particular nakshatra; what is begun in them is said to repeat, so anything that could bring a loss is avoided. A weekday runs from sunrise to the next sunrise.
Times are local to London. A day runs from sunrise to sunrise, so a window after midnight belongs to the date above it.