guardian sat

[pega]

I am stuck on;
13a candid writer of love letter? 4 ?p?n
25a no more fleeting Franco-german cheese celebration? 8 ?r?e?e?t
26a first of slats almost off seat 6 s???l?
the other one is a linked clue 3. 15 down anyone who has done this crossword please help I have king henry the ?e?o??
18a eagle secured by goosen,returning around 4 e?n?
is this erne. ?
Thanks for help.

[sarumite]

13a O pen

[sarumite]

25a Brie fest

[gen2]

18a Yes, ERNE (hidden backwards in the clue)

[gen2]

26a Someone gave this earlier today as SADDLE
S + addle(d)

[gen2]

and the remaining one would be SECOND

[pega]

Grateful thanks to all, don't usually buy this paper.

[MarinaHC]

This isn't an answer but a related question...the only ones I haven't got are

1a: "a nod or a sign and, classically, our victim apppears" (6) ???k??

4d: Hobbling after cross-dressing fun with tube? (2,4)
?? g?m?

10a: Hammer's cracked element with no opposition (3,3)
n?m ?o?

2,11: Placidity indeed - numerous Shed puzzles (4-12)
??e?-humouredness. Think it must be even-humouredness but not sure this is really a word...

Please help, thanks!