Applying from the UK: the Bangladesh High Commission

The British Bangladeshi community is one of the largest outside Bangladesh, and the questions it asks are largely the same as those asked in New York or Detroit. The answers, though, come from a different mission with its own fee schedule, its own submission arrangements and its own currency.

The short answer

Bangladesh is represented in the UK by a High Commission, not an embassy — Commonwealth countries exchange High Commissions. The consular work is the same.
Confirm which post covers where you live before you post or attend. Coverage may not be a single office for the whole of the UK.
Fees are published by the mission in its own schedule — check it before you send payment, as it changes. Do not assume the US figures convert.
NVR still costs $88 and the mandatory form is still at visa.gov.bd. The application fee is a Bangladeshi charge, not a US one; how it is paid in the UK is a mission question.

What is the same as the US

Almost all of the substance:

The e-passport is the passport. Renewal from abroad exists and the MRP is being phased out — see MRP to e-passport.
NVR is for people of Bangladeshi origin travelling on a foreign passport. If you hold a British passport and were once Bangladeshi, NVR is very likely your route: NVR explained, or NVR vs visa if you are unsure.
NID enrolment from abroad is limited to nine countries. Whether the UK is among them is not something we can state without checking the current list — see NID from abroad, which sets out what we do and do not know.
Document consistency is everything. Names, dates and parents’ names must read identically across the application, the old passport and the birth record.

What is different

The fee schedule and the payment method. A UK mission will have its own accepted forms of payment. Whether that is a postal order, a bank draft, a card or something else is a mission-published rule; confirm it rather than assuming the US money-order pattern applies. The general problem is the same one described in paying mission fees.
Submission arrangements. Some missions accept applications directly, some route them through appointment systems, and arrangements change. Ask.
Document attestation. The UK has its own apostille and legalisation regime, and how a British-issued document is prepared before a Bangladeshi mission will act on it differs from the US route. If your matter involves property, inheritance or a power of attorney, treat that as a separate question from the passport.

Preparing well

The failure modes do not change with the country:

Photographs. Bangladeshi passport photographs have their own specification, and a set taken to the UK passport standard is not automatically acceptable. Read the photo specification before you pay a photographer.
The checklist. Use the mission’s own published document list, and take the number of copies it asks for.
Timing. Build slack around travel, particularly around the winter season when demand peaks. Do not book non-refundable flights against an application that is still out.
Children. A separate document set applies — see renewing for children.

Once you are travelling

Entry paperwork and customs allowances are separate matters. What you may bring into Bangladesh is governed by the baggage rules regardless of which mission issued your paperwork; the duty calculator and the gold allowance page cover that side.

What we could not verify

The address, telephone numbers and email addresses of any UK post.
Which UK regions each post covers, and whether more than one post handles consular work.
The current fee schedule in sterling, and accepted payment methods.
Appointment and submission arrangements, and whether postal submission is available.
Current processing times.
Whether the UK is one of the nine countries where NID enrolment from abroad is available.

The mission publishes all of this, and it is the only source we would rely on.