Just to clarify, most Class E airspace in the UK is also a TMZ as detailed in the IAIP (extracts below).
Although Class E is controlled airspace, in which an air traffic control service is provided to IFR aircraft only, VFR aircraft may also operate within it and do not require a 'clearance' or need to be in contact with ATC, they will, however, require a functioning Mode S SSR transponder. VFR aircraft operating without a transponder can access the airspace, but must first establish two-way radio contact with air traffic control before entering. VFR flights that request an air traffic service will be assisted with either a Basic or a Traffic Service, subject to the operational capacity of the air traffic unit. Additional procedures are to be introduced to accommodate gliding activity through airway N560 between the Scottish TMA northern boundary and Inverness.
Notifications
2.5.1.1 The following airspace is notified as Class E Airspace:
(a) Parts of the Scottish Terminal Control Area below 6000 ft (See ENR 6-2-1-5);
(b) part of Airway N560 (between Glasgow VOR GOW and KOKAL) (See Note);
(c) part of Airway N562 (between Turnberry VOR TRN and Machrihanish DME MAC) (See Note);
(d) part of Airway N580 (between Glasgow VOR GOW and Tiree VOR TIR) (See Note);
(e) part of Airway P600 (between Aberdeen VOR ADN and BUDON) (See Note);
(f) Airway Y904 (between Aberdeen VOR ADN and Wick VOR WIK) (See Note);
(g) Airway Y905 (between Aberdeen VOR ADN and Sumburgh VOR SUM) (See Note);
(h) Airway Y906 (between RIMOL and Stornoway VOR STN) (See Note); →
(i) Airway Y911 (between BOYNE (FIR Boundary) and Isle of Man VOR IOM) (See Note);
(j) Airway Y958 (between BRUCE and TOBMO) (See Note).
Note: Additionally notified as Transponder Mandatory Zone airspace for the purposes of Article 39(2) and Schedule 5 paragraph
3(6)(b) of the Air Navigation Order 2009.