Dragons back row Lydiate (ankle) and Blues prop Jenkins (knee) will be integrated back into full training during the early part of this week as will Blues wing Alex Cuthbert, who is following the normal protocols following taking a bump to the head.
Cuthbert will be available for selection and it is also hoped his Blues colleague, the Wales captain Sam Warburton, will recovery sufficiently from a dead leg to be in contention, but his fitness will be continually assessed over the next few days.
While tickets are still available for Wales versus Scotland and the clash with Italy on Saturday 10 March, fans are advised to get their tickets now to avoid disappointment.
Tickets are available online at wru.co.uk and ticketlineuk.com or from the telephone hotline 02920 230130.
Wales fixtures for 2012 RBS 6 Nations Championship:
Sun 12th Feb 15:00 Wales v Scotland, Millennium Stadium
Sat 25th Feb 16:00 England v Wales, Twickenham
Sat 10th Mar 14:30 Wales v Italy, Millennium Stadium
Sat 17th Mar 14:45 Wales v France, Millennium Stadium
To attend the training session fans must register their interest first at www.wru.co.uk/watchwales4free to register your attendance - Gates open at 2pm with the session starting at 3pm and the team will train until 4.15pm.