England and Wales: Where there is a statutory requirement for a contract to be entered into in writing, it will be a matter of statutory interpretation as to what "writing" means in that context.  

Scotland: Section 1(2) of the Requirements of Writing (Scotland) Act 1995 specifies certain documents which must be made in writing.  

England and Wales: Guarantees (s4 of the Statute of Frauds); Assignment of Copyright (ss90(3) and 222(3) of the Copyright Designs and Patents Act 1988.  

Scotland: A contract or unilateral obligation for the creation, transfer, variation or extinction of a real right in land (s1(2)(a)(i) of ROWSA; Assignment of registered trade mark (s24(3) Trade Marks Act 1994).

No.

4. Main and relevant court practices

England: English case law generally indicates that electronic documents will satisfy a statutory requirement for writing, for example in J Pereira Fernandes SA v Mehta [2006] EWHC 813 the High Court held that an email containing the essential terms of an offer of a personal guarantee (which had been accepted orally and unconditionally by the other party) could constitute a sufficient note or memorandum of the agreement for the purposes of the Statute of Frauds.

5. In which cases are documents with wet ink signatures required?

In certain circumstances a wet ink signature will be required for registration purposes, for example real estate documents that require to be registered in the Land Registry (England & Wales) or Land Register (Scotland).

6. List of the relevant national legislation

EU Regulation No.910/2014 on electronic identification and trust services for electronic transactions in the internal market (eIDAS), Electronic Communications Act 2000, Interpretation Act 1978 (England & Wales), ROWSA (Scotland), The Electronic Documents (Scotland) Regulations 2014 (Scotland).

7.1 Remarks/Comments to use cases (if yes/no answer is not sufficient)

The above answers are subject to the following overriding comments.  Electronic signatures will be capable to execute documents (including in England and Wales, a deed) provided that (a) the person signing the document intends to authenticate the document; and (b) any formalities relating to the execution of the document are satisfied.  As noted above, there are circumstances where an electronic signature will not be permitted due to statutory requirements such as the registration of real property documents. It is also important to emphasise that use of the examples above will have different evidential weight, and in Scotland an electronic signature will only have probative (self-proving) status if an AdES is used.