3 Increased weight? Oxygen just might prove troublesome (2,2,2,4)
8 Shell informed: "No comment" (4,2)
9 Looks horrible but sounds quite fruity (4)
10 Popular greeting took hold of one - no return to suppression (10)
11 Held a meeting with short policemen (3)
13 File might be utilised if given this (4)
14 Left in charge, Opposition leader formed columns (7)
15 The ring of God (4)
17 Second firm responsible for breakage (5)
20 Measure of how I'd thought to be included (5)
22 Bark, "Romance with force!" (4)
24 Senior to but not in line (7)
25 City sounds perfect for travel (4)
27 Jam and butter (3)
28 Run and hide in the cathedral (10)
29 Is bitten, so fix (4)
30 Plant in grass and sun (6)
31 Mine in Mull excavated for many years (10)

1 Steering LHD bison can make one light-headed! (8)
2 I am swinging both ways and live for drink (6)
3 Conscientious to be awake, OK? (7)
4 The carton I carry contains something invigorating (5)
5 Speak for yourself, name-caller! (4)
6 Sort of imply a do lasts four years (8)
7 Canine, canine, canine (8)
12 Cook tea (4)
14 Look after flower - water suits it (4)
16 Plasterer's bird (4)
17 Airspace for advertising (8)
18 After third season, Alan is getting on (8)
19 The fight reported consisted of two (4)
21 Meal over, opportunity taken at work (3,5)
23 Not a full member but get ready anyway (7)
25 About to reduce repayment (6)
26 Boredom could be result of looking into this long-forgotten nuisance (5)
28 Article appears after 150 race (4)