Change of Title Question / advice

I am trying to add my spouse's name on the title of a new buy to let leasehold flat. Mortgage is buy to let only. We received the below charges and requests ;

Freeholder’s charge through it is agent SXXXXX:

Transfer - Deed of Covenant - £234.00


Transfer - Notice of Transfer - £162.00


Transfer - Certificate of Compliance - £216.00


Letting – Deed of Covenant - £150.00


Letting – Notice of Letting - £120.00

Management company’s charge :

Transfer – Deed of Covenant and Notice of Transfer and Certificate of Compliance - £180.00
Letting – Sublet Form - £120.00


Our conveyor thinks subletting content is required because of below clause highlighted in our lease, but i am not sure so I would like to confirm and appreciate your valuable opinions and advice.

My question is if subletting content and deed are not required but they insist , what is the next step? The reason is once we summit a subletting form, I am worried it has to be paid for after each tenant and all other registration fee from now on. They are very famous for expensive administration charges but we only knew once the developer sold to the current free holder.



Alienation

1. Not to assign transfer underlet charge or part with the possession or occupation of only a part or parts of the property ( as opposite to the whole of the property)
2. Not to assign or transfer or grant a registrable lease of the whole of the property without contemporaneously with such assignment transfer or letting ( as the case may be):
(A) procuring that the assignee transferee or tenant (as the case may be) enters into a deed of convenant
(B) making payment to the landlord or (as directed in pursuance of clause 3.1) the developer of the yearly rent including any arrears and any other sums which have fallen due and remain outstanding under this lease prior to the date of such assignment transfer or letting
(C) making payment of the expenses including any arrears and any other sums which have fallen due and remain outstanding under this lease prior to the date of such assignment transfer or letting
(D) obtaining the written consent of the landlord (such consent not to be withheld if paragraphs (a) to (c) above have been met)

3 During the last seven years of the term not to assign transfer underlet or part with the possession or occupation of the property without the prior written consent of the landlord (not to be unreasonably withheld)
4 notice of devolution
1. To lodge or procure to be lodged with the landlord ( or the landlord's solicitors or agents as the landlord shall so direct ) for the purpose of registration:

(a) all underleases of and all charges by way of legal mortgage upon the property or any part
(b) all other instruments made for effecting or evidencing any devolution of any legal estate in the property whether of the term or any sub~term or other derivative interest in the property or any part thereof and including probates and letters of administration and surrenders of any sub~terms and discharges of any charges of any charges by way of legal mortgage or certified copies of the originals but excluding assured shorthold tenancies where notification is not required and
(c) a certified copy of each deed of covenant referred in paragraph 2(a).