[herawaq]

I forwarded you query to Brother Colonel Hardstone and here is his reply:

Wasalam,

You need to calculate Salah times based on 18 degrees (University of Karachi) for your locality. When Isha & Fajar don't appear then you you are free to adopt any of the 4-5 methods as discussed and defined by Ulamah and you can choose to pray at any Masjid during those times.

Where Fajar & Esha do appear at 18 degrees and the times are valid:

There is little to no leeway in Fajar times so adopt 18 degrees

In addition to 18 degrees, you can also adopt 15 degrees for Esha as this is the opinion of students of Imam Abu Haneefa (RA) so there is some leeway.

Based on this research you have to judge whether the Salah times are valid and not merely on the basis of your Masjid timetable UNLESS you are sure of the method and degrees the timetable of your local Masjid is based upon.

That leaves the issue of Asar (Hanafi vs Shaf'ae) so majority of the Mosques in Europe (outside of UK) pray at Shaf'ae times and you can also pray at those times with congregation.

There is no difference in Fiqh on Dhohar & Maghrib.

If the Salah times fall within the criteria set by the Ulamah then Salah is valid so more details are needed as to how the Salah times are different to your local Mosque and why?

Jazakullah Khairun