Thanks everyone for your tips and ideas.
Update:
Well, two weeks after posing the original question, I was chomping at the bit to get back on the road and try a thing or two suggested by forum contributors. Today's race was 5 laps of a 10km circuit. About 20 in our grade, mild weather, just enough rain to make the road damp, no wind and with the biggest climb being 10m, you'd have to call it a flat course.
The initial pace was ridiculously slow, so I spent the first 2.5 laps out the front, sharing with 3 or 4 others, keeping the pace up. I figured if it was too slow, any breakaway attempt would certainly fail. After the second lap, I started playing with the field a bit. Each time I was leading, when passed by someone, I would slow peddle to allow a gap to open to the new leader. This forced everyone behind me to have to bridge a bit of a gap. I also paused through the corners to force a bit of effort for the bunch to stay together when accelerating out of the corners.
After two and a bit laps, I moved back to position 6 or 7th to rest.
Then, when turning onto the back straight, the guy next to me wobbled a bit, and looked down at his bike, looking for a problem. Not sure what happened, but between me slow pedalling through the corner, and him looking down, a gap of 7 or 8 metres opened in front of us. Time to break it up a bit. I jumped. Passed the leaders, and they all jumped too. The idea wasn’t necessarily to make a break, but with a gap between the leaders and the second half of the pack, I thought we might be able to break the pack in two. Not many wanted to work too hard, and I didn’t want to sacrifice myself, so after about 1km, we were all back together. I moved back to 6 or 7th again. No break, but make them work I say.
A lap later, around the same spot, another guy jumped and made a 10m break. I paused to see if he was going to continue, he was, so I jumped also, now with a 20m break to make. I made sure not to drag any one with me. We shared the lead, and after about 1km, I glanced to see another had joined us. As he passed me, I glanced behind again happy to see no one else had come with him, but we only had a 40m gap to the pack. We continued to work together for another 2km rotating well, but I was starting to feel the pinch and started to delay my rotation to attempt to catch my breath. The pack was still only 40 or 50m behind, so my fellow break-ies decided to pack it in and retreat back into the pack. On the plus side, the main pack lost a few riders in the chase, so it wasn’t a total waste.
Lesson 1. If I’m going to make a break, do less work leading up to it, otherwise it will and has cost me. This is going to be a hard lesson to learn. I’ve only been racing for 3 months, and have years of pack training where everyone continually takes their turn.
Lesson 2. Work on fitness.
Back together, I moved back to 6 or 7th again and waited for the final sprint. Unfortunately with 2km to go, we were caught by a collection of A and B graders who were overtaking each other, and then us. These guys still had another lap to go, so while faster as they passed us, we soon started to come back as our final stages heated up. Some of us started to tail the other grades. Too many bikes, a bit messy, especially given we were on public roads. A few of our grade, pulled back. I decided to do the same, and finished somewhere around 8th.
Aside from the disappointing finish, I really enjoyed a race which was a little different from the norm. Talking to one of the work horses after the race, he was one of two responsible for bringing the pack back to our breakaway. He's a strong rider for our grade, and I think if it wasn't for him, we may have escaped. Without spelling anything out, the seed has been planted for the following weeks. I suspect that the 6 week spell of no breakaways has been broken, and will continue to be broken. I look forward to next week, although rumour has it that this course has a hill or two. At 83kg on a bike that has minimal carbon, hills are not what I call fun.